Authors Year Title
Bogoslovsky 1981 Devonskie ammonoidei, III. Klimenii (Podotryad Gonioclymeniina).
Trudy paleont. Inst., 191: 1-122, fig.1-50, pl.1-16; Moskva.
Clausen, Korn & Luppold 1990 Untersuchungen zur Devon/Karbon-Grenze auf dem Müssenberg (Nördliches Rheinisches Schiefergebirge). [C.-D.Clausen,D.Korn,F.W.Luppold & D.Stoppel].
Bulletin de la Societé belge de Géologie, 98-3/4: 353-369, fig.1-3, pl.1-5; Bruxelles.
House 1963 Devonian ammonoid successions and facies in Devon and Cornwall.
Quarterly Journal of the Geological Society of London, 119: 1-27, fig.1-8, pl.1-4; London.
Selwood 1960 Ammonoids and Trilobites from the Upper Devonian and lowest Carboniferous of the Launceston area of Cornwall.
Palaeontology, 3 (2): 153-185, fig.1-8, pl.26-29; London.