Department of Geology, Tallinn University of Technology

Finnish Museum of Natural History, Helsinki University

Department of Earth and Planetary Sciences, University of Tennessee, Knoxville

Department of Geology, Tallinn University of Technology

Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences

USGS, Dept. Paleobiology, National Museum of Natural History, Smithsonian Institution

University of Chinese Academy of Sciences; Nanjing Institute of Geology and Palaeontology …

Associate Professor, University of Trás-os-Montes e Alto Douro

Professor Emeritus, University of Manitoba

Prof. of Geology and Palaeontology, Nanjing Inst. of Geology and Palaeontology, CAS