Baran, M., Kowalska, A., Milo?wka, B., & Ozorka, P..  (2015).  Identities for a derivation operator and their applications. Dolomites Research Notes on Approximation, 8(Special_Issue), 102-110. presented at the 12/2015. doi:10.14658/pupj-drna-2015-Special_Issue-10

Baran, M., & · Bialas-Ciez, L..  (2014).  Hölder continuity of the Green function, Markov-type inequality and a capacity related to HCP.  Dolomites Research Notes on Approximation, 7(Special_Issue), 16-21. presented at the 09/2014. doi:10.14658/pupj-drna-2014-Special_Issue-4