EFFECTS OF OXYGEN AND MAGNETIC IMPURITIES ON NUCLEAR RELAXATION ANOMALIES IN La-M-Cu-O (M = Ba, Sr) SYSTEMS K. Kumagai, I. Watanabe, Y. Nakamura et H. Nakajima J. Phys. Colloques, 49 C8 (1988) C8-2145-C8-2146 DOI: 10.1051/jphyscol:19888960