{"work":{"id":"e06b6a52-e3b5-456b-a726-2f0f9bf8ec66","openalex_id":null,"doi":"10.1016/0370-1573(91)90064-s","arxiv_id":null,"raw_key":null,"title":", year =","authors":null,"authors_text":"Bhattacharya, D","year":1991,"venue":null,"abstract":null,"external_url":"https://doi.org/10.1016/0370-1573(91)90064-s","cited_by_count":null,"metadata_source":"doi_reference","metadata_fetched_at":"2026-07-01T06:15:27.904703+00:00","pith_arxiv_id":null,"created_at":"2026-05-10T01:51:00.891052+00:00","updated_at":"2026-07-01T06:15:27.904703+00:00","title_quality_ok":false,"display_title":"1991\", month =","render_title":"1991\", month ="},"hub":{"state":{"work_id":"e06b6a52-e3b5-456b-a726-2f0f9bf8ec66","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":15,"external_cited_by_count":null,"distinct_field_count":3,"first_pith_cited_at":"2025-08-01T18:00:00+00:00","last_pith_cited_at":"2026-06-29T20:22:20+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-07-01T21:01:34.626285+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":2},{"context_role":"method","n":1}],"polarity_counts":[{"context_polarity":"background","n":2},{"context_polarity":"use_method","n":1}],"runs":{},"summary":{},"graph":{},"authors":[]}}