共 56 条
[1]
Belnap N. D., 1977, LOGIC QUESTIONS ANSW
[2]
BENNETT JL, 1972, ANNU REV INFORM SCI, V7, P159
[3]
BJERRE T, 1977, JUN P INT SEM INT QU, P191
[4]
CODD EF, 1972, DATA BASE SYSTEMS, V6
[5]
CODD EF, 1974, DATA BASE MANAGEMENT, P179
[6]
CODD EF, 1978, DATABASES IMPROVING, P3
[7]
CODD EF, 1978, RJ2144 IBM RES LAB R
[8]
CUFF RN, 1978, THESIS U ESSEX
[9]
CUFF RN, EESMMSCAS79 U ESS DE
[10]
Date C. J., 1977, INTRO DATABASE SYSTE