Verbatim text: Karis, P. O. and O. Ryding. 1994b. Tribe Helenieae. In: K. Bremer. 1994. Asteraceae: Cladistics & Classification. Portland. Pp. 521–558.
Author: Karis, P.O., Ryding, O.
Year: 1994b
Title: Tribe Helenieae
Editor: Bremer, K.
Book year: 1994
Book title: Asteraceae: Cladistics & Classification
Pages: 521–558

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Karis, P.O. +  and Ryding, O. +