1. A. Rényi, Some remarks on the theory of trees,Publ. Math. Inst. Hung. Acad. Sci.,4 (1959), 73–85.
2. P. Erdős andA. Rényi, On the evolution of random graphs,Publ. Math. Inst. Hung. Acad. Sci.,5 (1960), 17–61.
3. A. K. Kelmans, On the connectedness of random graphs,Avtomatika i Telemehanika (translated asAutomation and Remote Control),28 (1967), 98–116.
4. V. E. Stepanov, Combinatorial algebra and random graphs,Teoriya veroyatnostei i ee primeneniya,14 (1969), 393–420.
5. A. K. Kelmans, Asymptotic formulas for the probability ofk-connectedness of random graphs,Teoriya veroyatnosteí i ee primeneniya,17 (1972), 253–265.