vol. 31, no. 4 (2011)

Recursively arbitrarily vertex-decomposable suns
Olivier Baudon, Frédéric Gilbert, Mariusz Woźniak
Opuscula Math. 31, no. 4 (2011), 533-547, http://dx.doi.org/10.7494/OpMath.2011.31.4.533
Open trails in digraphs
Sylwia Cichacz, Agnieszka Görlich
Opuscula Math. 31, no. 4 (2011), 599-604, http://dx.doi.org/10.7494/OpMath.2011.31.4.599