Title of article :
Comments on “Crystal-melt equilibria involving potassium-bearing clinopyroxene as indicator of mantle-derived ultrahigh-potassic liquids: an analytical review”: by L.L. Perchuk, O.G. Safonov, V.O. Yapaskurt, and J.M. Barton Jr. [Lithos 60 (2002) 89–111]:
