Stoyan Yovchev

Volume 15 1 February 1985

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Vol. 21 (5)/October 1991 - p. 99

Dimitar Kozhoukharov

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Vol. 39 (1-2)/September 2010 - pp. 31-32

Stela Atanasova-Vladimirova

Bulgarian Academy of Sciences, Institute of Physical Chemistry, Bulgaria

Albrecht von Quadt

Institute of Isotope Geochemistry and Mineral Resources, ETH Zurich, Switzerland

Peter Marchev

Bulgarian Academy of Sciences, Geological Institute, Bulgaria

Irena Peytcheva

Institute of Isotope Geochemistry and Mineral Resources, ETH Zurich, Switzerland; Bulgarian Academy of Sciences, Geological Institute, Bulgaria

Iskra Piroeva

Bulgarian Academy of Sciences, Central laboratory of Mineralogy and Crystallography, Bulgaria

Bozhidar Mavrudchiev

Sofia University, Department of Mineralogy, Petrology, Ores and Minerals, Bulgaria

Vol. 46 (1)/July 2017 - pp. 3-25

Athanas Chatalov

Sofia University “St Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria

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