Schweitzer, Hans-Joachim (1980). «Environment and climate in the early Tertiary of Spitsbergen». Palaeogeography, Palaeoclimatology, Palaeoecology. 30: 297–311. ISSN0031-0182. doi:10.1016/0031-0182(80)90062-0.
Schweitzer, Hans-Joachim (1980). «Environment and climate in the early Tertiary of Spitsbergen». Palaeogeography, Palaeoclimatology, Palaeoecology. 30: 297–311. ISSN0031-0182. doi:10.1016/0031-0182(80)90062-0.