Source notes for Problem 644

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bucic_et_al_2019_covering_graphs_by_monochromatic_trees_helly_type_results_hypergraphs: Source notes for Problem 644: Bucić et al.: Covering graphs by monochromatic trees and Helly-type results for hypergraphs.

erdos_1997_some_recent_problems_results_graph_theory: Source notes for Problem 644: Erdös: Some recent problems and results in graph theory.

fon_der_flaass_et_al_1999_transversals_uniform_hypergraphs_property_7_2: Source notes for Problem 644: Fon-Der-Flaass et al.: Transversals in uniform hypergraphs with property (7,2).

tuza_1985_critical_hypergraphs_intersecting_set_pair_systems: Source notes for Problem 644: Tuza: Critical hypergraphs and intersecting set-pair systems.

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These notes summarize sources used in the research. Consult the canonical library records where linked for retained reading copies and bibliographic details.