Authors:
ACKERMANN M
BREITSCHUH W
BUCHLER H
KUPPERS G
LUHRS C
SCHLOTHMANN BJ
STAATS G
ZENS R
Citation: M. Ackermann et al., PRIMARY REFERENCE MATERIALS FOR CHEMICAL-COMPOSITION ANALYSIS - PROPOSAL FOR AN OPERATIONAL DEFINITION, Fresenius' journal of analytical chemistry, 357(6), 1997, pp. 562-562