@article{e53747d9511c4b81b3b80bd18586cecf,
title = "Topological invariant for superfluid 3He-B and quantum phase transitions",
keywords = "Majorana fermions, superfluid 3He-B, topological insulator, topological invariant, Majorana fermions, superfluid 3He-B, topological insulator, topological invariant, Majorana fermions, superfluid 3He-B, topological insulator, topological invariant",
author = "Grigory Volovik",
year = "2009",
language = "English",
volume = "90",
pages = "639--643",
journal = "JETP Letters/Pis'ma v Zhurnal {\'E}ksperimetal'noi i Teoreticheskoi Fiziki",
issn = "1090-6487",
publisher = "MAIK Nauka/Interperiodica",
}