@article {Geyer1969,
	title = {Die Korallen-Gattung Halysitastraea aus dem Oberjura Kolumbiens und ihre Hom{\"o}omorphien mit altpal{\"a}ozoischen Halysitiden},
	journal = {Pal{\"a}ontologische Zeitschrift},
	volume = {43},
	number = {1/2},
	year = {1969},
	pages = {28{\textendash}31},
	keywords = {BL, TIP},
	doi = {10.1007/BF02987924},
	url = {http://link.springer.com/article/10.1007/BF02987924},
	author = {Geyer, O F}
}
