共 5 条
[1]
BERKOVITS N, 1988, MAY STRINGS 88 C P
[3]
FRIEDAN D, 1986, NUCL PHYS B, V271, P93
[4]
KOSTELECKY VA, 1987, NUCL PHYS B, V288, P173, DOI 10.1016/0550-3213(87)90213-6