Er3+ spin relaxation and magnetic coupling in ErNi2 B2C, Er(Ni0.975Co0.025)2B2C and Er0.2Y0.8Ni2B2C from 166Er Mössbauer me (各種Er系硼素炭化物のEr3+のスピンカップリングと磁気カップリング)
J.A. Hodges, P. Bonville, H. Takeya, C. Godart, E. Alleno, G. Hilscher, H. Michor, M. El-Hagary, A.M. Mulders.