A relational calculus with set operators, its safety, and equivalent graphical languages | IEEE Transactions on Software Engineering |
- Science: Mathematics: Instruments and machines: Electronic computers. Computer science: Computer software
- Technology: Electrical engineering. Electronics. Nuclear engineering: Electric apparatus and materials. Electric circuits. Electric networks
- Science: Mathematics: Instruments and machines: Electronic computers. Computer science
- Science: Mathematics: Instruments and machines: Electronic computers. Computer science: Computer software
- Technology: Electrical engineering. Electronics. Nuclear engineering: Electronics: Computer engineering. Computer hardware
- Science: Mathematics: Instruments and machines: Electronic computers. Computer science
| 20 | 1989 |