{"as_of":"2026-08-21T23:04:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:29054d06195a4f628e8d5e9cfcd80932018443c425321fc75055ce19a717d556","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":1,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":1,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-21T06:32:19.484+00:00","state":"measured"},{"denominator":1,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":1,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-14T14:20:02.270916Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"pith","source_observed_at":"2026-08-14T14:20:02.607074Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1901.02170","last_updated":"2020-05-10T17:22:37Z","snapshot_observed_at":"2026-08-16T17:00:21.318940Z","submitted_at":"2019-01-08T06:29:30Z","title":"Tight trees and model geometries of surface bundles over graphs","version":2},"cited_work":{"arxiv_id":"1901.02170","doi":null,"metadata_source":"pith","pith_arxiv_id":"1901.02170","snapshot_observed_at":"2026-08-14T14:20:02.607074Z","title":"Tight trees and model geometries of surface bundles over graphs","venue":"math.GT","work_id":"d365a1a2-adf3-44ea-9e73-ea21140a2087","year":2019},"citing_paper":{"arxiv_id":"1908.03545","last_updated":"2024-11-19T11:29:22Z","snapshot_observed_at":"2026-08-20T09:30:44.148994Z","submitted_at":"2019-08-09T17:15:12Z","title":"Cubulating Surface-by-free Groups","version":3},"reference_index":56,"source":"arxiv_source","source_observed_at":"2026-08-14T14:20:02.270916Z"},"links":{"cited_paper":"/paper/1901.02170","citing_paper":"/paper/1908.03545"},"observation_digest":"sha256:c144fb50aede9bb76fca5615c6c63cb0fc8217e6059f18d2b658b64497668f35","observation_id":"1d17aee0-ef9f-4524-b361-5138bbf5d1e5","resolution":{"observed_at":"2026-08-14T14:20:02.612965Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-21T06:32:19.484+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-21T06:32:19.484+00:00","source":"crossref"},{"observed_at":"2026-08-21T06:32:16.066871+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/1901.02170/citation-record","integrity":"/paper/1901.02170/integrity","json":"/paper/1901.02170/citation-record.json","paper":"/paper/1901.02170"},"outbound":[],"paper":{"arxiv_id":"1901.02170","last_updated":"2020-05-10T17:22:37Z","latest_version":2,"primary_category":"math.GT","snapshot_observed_at":"2026-08-16T17:00:21.318940Z","submitted_at":"2019-01-08T06:29:30Z","title":"Tight trees and model geometries of surface bundles over graphs"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-21T06:32:19.484+00:00","source":"crossref"},{"observed_at":"2026-08-21T06:32:16.066871+00:00","source":"retraction_watch"}],"thesis":"As of 21 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:1901.02170."}