共 10 条
[1]
BUTLER GB, 1976, POLYM PREPR DIV POLY, V17, P608
[3]
KEEHN PM, 1977, J AM CHEM SOC, V99, P3797
[4]
OCONNOR JG, 1977, TETRAHEDRON LETT, P3711
[6]
STAAB HA, 1974, TETRAHEDRON LETT, P4397