Alfonz Haviar

All trees of diameter five are graceful

Pavel Hrnciar, Alfonz Haviar, Alfonz Haviar, 2001, Discret. Math..

On varieties of orgraphs

Gabriela Monoszová, Alfonz Haviar, 2001, Discuss. Math. Graph Theory.

Varieties of Posets

Alfonz Haviar, Judita Lihová, 2005, Order.

On varieties of graphs

Roman Nedela, Alfonz Haviar, 1998, Discuss. Math. Graph Theory.

ECCENTRIC SEQUENCES AND CYCLES IN GRAPHS

Alfonz Haviar, Pavel Hrn, 2004 .