1987

Altermann, Wladyslaw and Helmcke, Dietrich (1987): Sedimentation and volcanism during the Permian in the Petchabun Basin, Thailand. In: Terra cognita, Vol. 7, No. 2/3: p. 114

1983

Altermann, Wladyslaw and Grammel, S. and Ingavat, R. and Nakornsri, N. and Helmcke, Dietrich (1983): On the evolution of the Palaeozoic terrains bordering the northwestern Khorat Plateau. Conference on Geology and Mineral Resourses of Thailand, Nov. 1983, Bangkok.