BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Chang, Gerard J. P Principal Hwang, Frank K. P Principal Tong , Li-Da P Principal The consecutive-4 digraphs are Hamiltonian Vol: 31 p. 1-6