共 23 条
[21]
ROZENBLUM G, 1997, ST PETERSB MATH J, V9, P1195
[22]
ROZENBLYUM GV, 1972, DOKL AKAD NAUK SSSR+, V202, P1012
[23]
SALOFFCOSTE L, 1992, J DIFFER GEOM, V36, P417