共 18 条
[4]
DOUGLAS M, 1987, CALT681453 PREPR
[9]
GEPNER D, 1988, PUPT1115 PRINC U PRE
[10]
GODDARD P, 1985, PHYS LETT B, V152, P88, DOI 10.1016/0370-2693(85)91145-1