(en) Mitsuko Wate-Mizuno, « Mathematical recreations of Dénes König and his work on graph theory », Historia Mathematica, explorations on the History of Recreational Mathematics, vol. 41, no 4, , p. 377–399 (ISSN0315-0860, DOI10.1016/j.hm.2014.06.001, lire en ligne, consulté le )
(en) Mitsuko Wate-Mizuno, « Mathematical recreations of Dénes König and his work on graph theory », Historia Mathematica, explorations on the History of Recreational Mathematics, vol. 41, no 4, , p. 377–399 (ISSN0315-0860, DOI10.1016/j.hm.2014.06.001, lire en ligne, consulté le )
(en) Mitsuko Wate-Mizuno, « Mathematical recreations of Dénes König and his work on graph theory », Historia Mathematica, explorations on the History of Recreational Mathematics, vol. 41, no 4, , p. 377–399 (ISSN0315-0860, DOI10.1016/j.hm.2014.06.001, lire en ligne, consulté le )