References on Nanacalathis
Bitner M.A. & T. N. Molodtsova, 2018. Redescription of Nanacalathis atlantica Zezina, 1991 (Brachiopoda: Chlidonophoridae) from the North Atlantic. Marine Biodiversity, 48 (2), 995-999.
Cooper G. A., 1973. Vema's brachiopods (Recent) Smithson. Contr. Paleobiol., 17, 1-51.
Logan A., Wirtz P. & Swinnen F., 2009. New record of Novocrania (Brachiopoda, Craniida) from Madeira, with notes on Recent brachiopod occurrences in the Macaronesian archipelagos. Arquipelago. Life and Marine Sciences, 24, 17-22.
Zezina O. N., 1981. New and rare cancellothyroid brachiopods (in Russian). Trud. Inst. Okeanol. Acad. Nauka, 115, 155-164.
Zezina O. N., 1991. A new species of cancellothyrioid brachiopods from the 'Atlantis' fracture of Mid-Atlantic ocean ridge (in Russian). Zool. Zh., 70 (6), 152-153.
Zezina O. N., 1994. Deep-Sea brachiopods. Their peculiarities in morphology and evolution. Sarsia, 79 (1), 59-64.
Zezina O. N., 2001. Some ecological and geographical characteristics of brachiopods living at underwater rises and nearly the islands of the North Atlantic [in Russian]. In: Composition and structure of the marine bottom biota, VNIRO Publ., Moscow, pp. 58-62.
Zezina O. N., 2003. On the ecological, morphological, and evolutionary features of brachiopods living in marginal and extreme environments. Paleontological Journal, 37 (3), 263-269.
Zezina O. N., 2006. Deep-sea brachiopods in Russian collections from the Atlantic Ocean. In: Biogeography of the North Atlantic Seamounts, Mironov A. N., A. V. Gebruk, A. J. Southward, eds. - 196 pp. KMK Scientific Press Ltd, Moscow, p. 67-75.
Zezina O. N., 2014. Deep-sea fauna of European seas: An annotated species check-list of benthic invertebrates living deeper than 2000 m in the seas bordering Europe. Brachiopoda. Invertebrate Zoology, 11 (1), 83–88.