@misc{KosterinSolovyev2017,
  author    = {Oleg E. Kosterin and Vladimir I. Solovyev},
  title     = {Odonata found in mid-summer 2015 and 2016 at the north-westernmost Black Sea Coast of the Caucasus, with the first record of Cordulegaster picta Selys, 1854 in Russian Federation // Calopteryx virgo feminalis subsp. nov., a long known under the same name but hitherto formally nameless subspecies from the Caucasian Black Sea Coast},
  booktitle = {International Dragonfly Fund : Report},
  series    = {IDF-Report : newsletter of the International Dragonfly Fund},
  number    = {107},
  type      = {periodicalpart},
  pages     = {1 -- 58},
  year        = {2017},
}