Volume 96, Number 1, December 1991
Michael D. Hendy:
A combinatorial description of the closest tree algorithm for finding evolutionary trees. 51-58
Ferenc Juhász:
The asymptotic behaviour of Fiedler's algebraic connectivity for random graphs. 59-63
Volume 96, Number 2, December 1991
R. E. Peile:
Inclusion transformations: (n, m)-graphs and their classification. 111-129
Lorenzo Traldi:
Generalized activities and K-terminal reliability. 131-149
Volume 96, Number 3, December 1991