1. Proceedings of the International Research School and Workshop on Electronic Crystals ECRYS 2011, Physcia B 407, edited by S. Brazovskii, N. Kirova, P. Monceau (2011)
2. P. Monceau, Adv. Phys. 61, 325 (2012)
3. N.P. Ong, K. Maki, Phys. Rev. B 32, 6582 (1985)
4. L.P. Gor’kov, JETP Lett. 38, 87 (1983)
5. L.P. Gor’kov, Sov. Phys. JETP 59, 1057 (1984)