paper: doi:10.1090/s0002-9939-1956-0078686-7

Ingested works. lom_id is the stable key (doi: or arxiv:). OpenAlex/S2/arXiv ids when found; never fabricated.

Data license: Space charter; records cite primary sources · Data source: TeamScience Space repository

This data as json

lom_id	doi	openalex	s2_paper_id	arxiv	pmid	pmcid	acl	title	year	venue	oa_url	ingested_ts	source
doi:10.1090/s0002-9939-1956-0078686-7	10.1090/s0002-9939-1956-0078686-7	W1965680834						On the shortest spanning subtree of a graph and the traveling salesman problem	1956	Proceedings of the American Mathematical Society	https://www.ams.org/proc/1956-007-01/S0002-9939-1956-0078686-7/S0002-9939-1956-0078686-7.pdf	2026-09-02T02:37:09Z	openalex

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