Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 6-12

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 13-33

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 35-66

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 67-76

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 85-96

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 97-108

Published in Historia Naturalis Bulgarica, in 1999, in volume 10, pages 109-115

Published in Historia naturalis bulgarica, in 1999, in volume 10, pages 125-131

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