[1]
A. V. Yablokov, V. J. Eatin, und L. N. Pritikina, „Variability of wing venation of the dragonfly“., contrib.entomol., Bd. 20, Nr. 5-6, S. 503–526, Sep. 1970, doi: 10.21248/contrib.entomol.20.5-6.503-526.