@article {330,
	title = {Identities for a derivation operator and their applications},
	journal = {Dolomites Research Notes on Approximation},
	volume = {8},
	year = {2015},
	month = {12/2015},
	pages = {102-110},
	publisher = {Padova University Press},
	address = {Padova, IT},
	issn = {20356803},
	doi = {10.14658/pupj-drna-2015-Special_Issue-10},
	url = {http://drna.padovauniversitypress.it/2015/specialissue/10},
	author = {Miros{\l}aw Baran and Agnieszka Kowalska and Beata Milówka and Pawe{\l} Ozorka}
}