

@article {16291,
	title = {Ein Zweistufenverfahren zur Virusanreicherung aus L{\"o}sungen mit geringem Virustiter},
	journal = {Journal of hygiene, epidemiology, microbiology, and immunology},
	volume = {25},
	year = {1981},
	pages = {71{\textendash}81},
	author = {Walter, R. and R{\"u}diger, S.}
}
