[1] J. Černý: Niektoré aplikácie teórie grafov v železničnej doprave. (Some applications of the graph theory in the railway traffic.) Lecture at the Conference on Graph Theory held at Štiřín in May 1972.

[2] K. Čulík: Bloková schémata v algoritmických algebrách. (Block schemes in algorithmic algebras.) Lecture at the Conference on Graph Theory held at Štiřín in May 1972.

[3] O. Ore: Theory of Graphs. Providence 1962. MR 0150753 | Zbl 0105.35401

[4] F. Zítek: Polarisované grafy. (Polarized graphs.) Lecture at the Conference on Graph Theory held at Štiřín in May 1972.