title: Variation of Fumarprotocetraric and Protocetraric Acids in Cetraria islandica and C. ericetorum.
authors.affiliation: Division of Pharmacognosy, School of Pharmacy, University of Helsinki.
authors.forename: K
authors.initials: K
authors.lastname: Huovinen
authors.forename: P
authors.initials: P
authors.lastname: Härmälä
authors.forename: R
authors.initials: R
authors.lastname: Hiltunen
authors.forename: M
authors.initials: M
authors.lastname: V Schantz