Peck,R.E.. (1938): A new family of Charophyta from the Lower Cretaceous of Texas . Journal of Paleontology Vol. 12(2) p. 173-176
Peck,R.E.. (1941): Lower Cretaceous Rocky Mountain nonmarine microfossils . Journal of Paleontology Vol. 15(3) p. 285-304
Grambast,L.. (1968): Evolution of the utricle in the charophyte genera Perimneste Harris and Atopochara Peck . Journal of the Linneau Society of London, Botany Vol. 61(384) p. 5-11
Schudack,M.E.. (1993): Die Charophyten in Oberjura und Unterkreide Westeuropas Mit einer phylogenetischen Analyse der Gesamtgruppe . Berl. Geowiss. Abh., Reihe E Vol. 8 p. 1-209
Martin-Closas,C.. (1996): A phylogenetic system of Clavatoracae (fossil charophyta) . Review of Palaebotany and Palynologie Vol. 94(3-4) p. 259-293
Feist,M.; Charriere,A. and Haddoumi,H. (1999): Decouverte de charophytes aptiennes dans les couches rouges continentales du Haut-Atlas oriental (Maroc) . Bulletin de la Societe Geologique de France Vol. 170(5) p. 611-618
|