@inbook {Tchechmedjieva1981,
	title = {Anthozoa},
	booktitle = {Fosilite na Blgariya},
	year = {1981},
	pages = {27{\textendash}51, pl. 5{\textendash}11},
	publisher = {Gora Kreda},
	organization = {Gora Kreda},
	address = {Sofia},
	keywords = {RCBS, TIP},
	author = {Tch{\'e}chm{\'e}dji{\'e}va, V},
	editor = {Tsankov, V}
}
