{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SRAVOM6G744OS2CGZD5FRTJFXG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f6ce66b1552322c63c2b13c72fd3172d925626c67bcde756828337f4a86f1f11","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2013-06-18T14:53:59Z","title_canon_sha256":"ed8e8ae6b0dbe19abd7f6293ba052988a38c63ed7316f5b9a39750fe8bbe33a4"},"schema_version":"1.0","source":{"id":"1306.4223","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.4223","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"arxiv_version","alias_value":"1306.4223v2","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.4223","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"pith_short_12","alias_value":"SRAVOM6G744O","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SRAVOM6G744OS2CG","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SRAVOM6G","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:5529950d86f7d515b17047784820bb88fe3d716ba00debe6fda3e06c39af2f4c","target":"graph","created_at":"2026-05-18T00:32:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The number of references per paper, perhaps the best single index of a journal's scholarliness, has been studied in different disciplines and periods. In this paper we present a four decade study of eight engineering journals. A data set of over 70000 references was generated after automatic data gathering and manual inspection for errors. Results show a significant increase in the number of references per paper, the average rises from 8 in 1972 to 25 in 2013. This growth presents an acceleration around the year 2000, consistent with a much easier access to search engines and documents produce","authors_text":"Felipe L\\'opez-Fernandino, I\\~naki Ucar, Joaqu\\'in Sevilla, Laura Sesma-Sanchez, Pablo Rodriguez-Ulibarri, Veronica Urrea-Mic\\'o","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2013-06-18T14:53:59Z","title":"Growth in the number of references in engineering journal papers during the 1972-2013 period"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.4223","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:12866a2e559ef05b6c75909a8fd6d868a9115e977c825aea46f5d00517508244","target":"record","created_at":"2026-05-18T00:32:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f6ce66b1552322c63c2b13c72fd3172d925626c67bcde756828337f4a86f1f11","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2013-06-18T14:53:59Z","title_canon_sha256":"ed8e8ae6b0dbe19abd7f6293ba052988a38c63ed7316f5b9a39750fe8bbe33a4"},"schema_version":"1.0","source":{"id":"1306.4223","kind":"arxiv","version":2}},"canonical_sha256":"94415733c6ff38e96846c8fa58cd25b99e797f253beaaea03cc807c604e115e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94415733c6ff38e96846c8fa58cd25b99e797f253beaaea03cc807c604e115e6","first_computed_at":"2026-05-18T00:32:03.397384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:03.397384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fxtW6kKFos//utvUtg4eJqlbowXGaSmDGB+R+kgtrqN1D8edg94wKghlCJMTvO+T0AtNz6J6rrxJfgoYqdKaBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:03.397875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.4223","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12866a2e559ef05b6c75909a8fd6d868a9115e977c825aea46f5d00517508244","sha256:5529950d86f7d515b17047784820bb88fe3d716ba00debe6fda3e06c39af2f4c"],"state_sha256":"fba23b64e1b4dac10fc3766ac4b26b0771575207e5abebb75bbb3ca70712a523"}