Published in Historia Naturalis Bulgarica, in 2001, in volume 13, pages 5-51

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 53-68

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 69-78

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 79-87

Published in Historia Naturalis Bulgarica, in 2001, in volume 13, pages 89-92

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 93-107

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 109

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 111-122

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 123-126

Published in Historia naturalis bulgarica, in 2001, in volume 13, pages 155-157