Published in Historia naturalis bulgarica, in 2000, in volume 12, pages 89-128

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Published in Historia naturalis bulgarica, in 1990, in volume 2, pages 61-63

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Published in Historia naturalis bulgarica, in 1990, in volume 2, pages 64-66

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Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 133-146

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Published in Historia naturalis bulgarica, in 2002, in volume 14, pages 141-144

Created: 2016-09-16, modified: 2016-09-16

Published in Historia naturalis bulgarica, in 1998, in volume 9, pages 101-113

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Published in Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie, in 2002, in volume 42, pages 83-101

Created: 2017-02-01, modified: 2017-02-01

Published in Historia naturalis bulgarica, in 1997, in volume 7, pages 109-113

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Published in Historia naturalis bulgarica, in 1997, in volume 7, pages 71-96

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Published in Historia naturalis bulgarica, in 1997, in volume 8, pages 101-120

Created: 2016-09-16, modified: 2016-09-16

Published in Historia naturalis bulgarica, in 2002, in volume 14, pages 123-140

Created: 2016-09-16, modified: 2016-09-16