共 20 条
[2]
AKIN JS, 1984, DEMAND PRIMARY HLTH
[3]
AKIN JS, 1986, EC DEV CULTURAL CHAN, V4, P755
[4]
BOLDNC D, 1994, 9421 CREST
[8]
HAJIVASSILIOU VA, 1991, SIMULATION MULTIVARI
[10]
HOROWITZ J, 1979, TRASNPORTATION RES, V35, P23