[1] Bollobás B. Modern Graph Theory. New York: Springer-Verlag, 1998

[2] Ostrovskii M I. Minimal congestion trees. Discrete Math, 2004, 285: 219--226

[3]  Ostrovskii M I. Sobolev spaces on graphs. Quaestiones Mathematicae, 2005, 28: 501--523

[4]  Wu B Y, Chao K M. Spanning trees and optimization problems. Boca Raton: Chapman & Hall/CRC, 2004

[5]  Asratian A S, Denley T M J, Häggkvist P. Bipartite graphs and their applications. Cambridge: Cambridge University Press, 1998

[6]  Jordan C. Sur les assemblages de lignes. J Reine Angew Math, 1869, 70: 185--190

[7]  Harary F. Graph Theory. London: Addison-Wesley Publishing Company, 1969

[8]  Janson S, L uczak T, Ruci\'nski A. Random graphs. New York: Wiley, 2000

[9]  Bollobáas B, Thomason A. Random graphs of small order//Karo\'nski M, Ruci\'nski A eds. Random Graphs `83. Amsterdam: North-Holland, 1985: 47--97

[10]  Bollobàs B. Random graphs. London: Academic Press, 1985