共 18 条
[1]
BACHMAN PW, 1972, RES MANAGEMENT MAY, P58
[2]
BEGGS JJ, 1984, R D PATENTS PRODUCTI, P295
[3]
BRANCH B, 1973, J ECON BUS, V25, P107
[5]
BRENNER MS, 1989, RES TECHNOL MANA MAR, P8
[6]
FOSTER RN, 1985, RES MANAGEMENT MAR, P13
[7]
FOSTER RN, 1985, RES TECHNOLOGY M JAN, P12
[8]
GILMAN JJ, 1978, MANAGE REV, V67, P23
[9]
INDUSTRIAL RESEARCH AND DEVELOPMENT, INTANGIBLE CAPITAL STOCKS, AND FIRM PROFIT RATES
[J].
BELL JOURNAL OF ECONOMICS,
1978, 9 (02)
:328-343