Über ein Extremalproblem der Graphentheorie

[1]  Paul Erdös,et al.  On a theorem of Rademacher-Turán , 1962 .

[2]  P. Erdös,et al.  Graph Theory and Probability , 1959, Canadian Journal of Mathematics.

[3]  P. Turán.  On the theory of graphs , 1954 .

[4]  de Ng Dick Bruijn.  A combinatorial problem , 1946 .