HEMEL, Lars. The Pozzo del Merro or Merro Sink Hole is with almost 400 meter deep the deepest flooded sinhole in the world [online]. [cit. 2016-11-08]. Dostupné online. (anglicky)
jstor.org
IANILLI, Valentina; TAGLIANTI, Augusto Vigna. Crustaceana. New Data on the Genus Niphargus (Amphipoda, Niphargidae) in Italy, with the Description of a New Species of the Orcinus Group [online]. 2004 [cit. 2016-11-08]. Dostupné online. (anglicky)
wondermondo.com
Pozzo del Merro [online]. [cit. 2016-11-08]. Dostupné online. (anglicky)