@conference {van1958non,
	title = {Non-marine Mollusca of the limestone hills in Malaya},
	booktitle = {Proceedings of the Centenary and Bicentenary Congress of Biology},
	year = {1960},
	pages = {63{\textendash}68},
	author = {van Benthem-Jutting, W.S.S.}
}
@conference {berry1964reproduction,
	title = {The reproduction of the minute cyclophorid snail Opisthostoma (Plectostoma) retrovertens from a Malayan limestone hill},
	booktitle = {Proceedings of the Zoological Society of London},
	volume = {142},
	number = {4},
	year = {1964},
	pages = {655{\textendash}664},
	publisher = {Wiley Online Library},
	organization = {Wiley Online Library},
	author = {Berry, AJ}
}
