A Ramsey Treatment of Symmetry. - Taras O. Banakh; Oleg V. Verbitsky 001; Yaroslav Vorobets (Electron. J. Comb., 2000)

Fermat's Spiral and the Line Between Yin and Yang. - Taras O. Banakh; Oleg Verbitsky 001; Yaroslav Vorobets (Am. Math. Mon., 2010)

Automata over a Binary Alphabet Generating Free Groups of Even Rank. - Benjamin Steinberg; Mariya Vorobets; Yaroslav Vorobets (Int. J. Algebra Comput., 2011)