Katz, 1955, Probability of Indecomposability of a Random Mapping Function, Ann. Math. Statist., 26, 512, 10.1214/aoms/1177728496
Moon, 1964, The Second Moment of the Complexity of a Graph, Mathematika, 11, 95, 10.1112/S0025579300004290
Moon, 1967, Enumerating Labelled Trees, 261
Rényi, 1959, On Connected Graphs, I, Publ. Math. Inst. Hungar. Acad. Sci., 4, 385
Rényi, 1967, On the Height of Trees, J. Australian Math. Soc., 7, 497, 10.1017/S1446788700004432
Sedláček, 1967, O kostrách konečných grafů, Časopis Pěst. Mat., 92, 338, 10.21136/CPM.1967.108402