@book{19688,
	title = {Quintessence international},
	publisher = {Quintessenz Verlags},
	address = {Berlin},
	note = {Vol. 42, no. 6 7, 9-10 (2011)-: Vol. 43, no. 1-5, 9,10 (2012)-: Vol. 44, no. 1-7(2013)-: Vol. 45, no. 4, 7 (2014)-}
}