@article {Kryszewski1997,
	title = {Encyklopedia},
	volume = {2017},
	number = {9.01.2017},
	year = {1997},
	month = {2017},
	publisher = {PWN},
	address = {Warszawa},
	url = {http://encyklopedia.pwn.pl/haslo/;3897884},
	author = {Kryszewski,W{\l}odzimierz}
}
