The coordinate representation of a graph and n-universal graph of radius 1. - Alexander V. Ivashchenko (Discret. Math., 1993)

Representation of smooth surfaces by graphs. Transformations of graphs which do not change the Euler characteristic of graphs. - Alexander V. Ivashchenko (Discret. Math., 1993)

Some properties of contractible transformations on graphs. - Alexander V. Ivashchenko (Discret. Math., 1994)

Contractible transformations do not change the homology groups of graphs. - Alexander V. Ivashchenko (Discret. Math., 1994)

Graphs of spheres and tori. - Alexander V. Ivashchenko (Discret. Math., 1994)

Minimal graphs of a torus, a projective plane and spheres and some properties of minimal graphs of homotopy classes. - Alexander V. Ivashchenko; Yeong-Nan Yeh (Discret. Math., 1994)