Ordered phase of nuclear spins in uniaxial ferromagnets at ultralow temperatures T. Buishvili, N. Giorgadze, R. Khomeriki and L. Tkeshelashvili Eur. Phys. J. B, 12 4 (1999) 515-517 Published online: 15 December 1999 DOI: 10.1007/s100510051033