@article {Roniewicz1971,
	title = {Upper Jurassic coral assemblages of the central Polish uplands},
	journal = {Acta Geologica Polonica},
	volume = {21},
	year = {1971},
	pages = {399{\textendash}422},
	keywords = {JS, TIP},
	author = {Roniewicz, Ewa and Roniewicz, P}
}
