@article {2190,
	title = {Studies on Olividae. XIX. Where is the suture of Oliva shells?},
	journal = {Apex},
	volume = {9},
	year = {1993},
	pages = {47-50},
	keywords = {filament channel, Studies on Olividae series, suture},
	author = {Osselaer, C. van and Tursch, B.}
}
@article {189,
	title = {Studies on Olividae. IX. Ten additional suture characters for Oliva taxonomy},
	journal = {Apex},
	volume = {3},
	year = {1988},
	pages = {81-87},
	keywords = {biometrics, Studies on Olividae series, suture},
	author = {Osselaer, C. van and Tursch, B.}
}
@article {194,
	title = {Studies on Olividae. VI. Suture measurements as taxonomic characters in the genus Oliva},
	journal = {Apex},
	volume = {2},
	year = {1987},
	pages = {69-84},
	keywords = {biometrics, Studies on Olividae series, suture},
	author = {Tursch, B. and Osselaer, C. van}
}
