On k-Path Traceable Graphs. - Günter Schaar (J. Inf. Process. Cybern., 1988)

On 'maximal' Hamiltonian cycles in the square of a block. - Günter Schaar (Discret. Math., 1993)

Remarks on Hamiltonian Properties of Powers of Digraphs. - Günter Schaar (Discret. Appl. Math., 1994)

On the Hamiltonicity exponent of directed cacti. - Günter Schaar (Discret. Math., 1997)

An upper bound for the Hamiltonicity exponent of finite digraphs. - Günter Schaar; A. Pawel Wojda (Discret. Math., 1997)

On traceable powers of digraphs. - Antoni Marczyk; Günter Schaar (Discret. Math., 2000)

On special numberings of hypergraphs. - Günter Schaar (Discret. Math., 2000)

Pairs of trees in tree-tree triangulations. - Günter Schaar; Zdzislaw Skupien (Discret. Math., 2007)