Victor M. Markowitz, Yoav Raz. An entity-relationship algebra and its semantic description capabilities. Journal of Systems and Software, 4(2-3):147-162, 1984. [doi]
@article{MarkowitzR84,
title = {An entity-relationship algebra and its semantic description capabilities},
author = {Victor M. Markowitz and Yoav Raz},
year = {1984},
doi = {10.1016/0164-1212(84)90005-0},
url = {http://dx.doi.org/10.1016/0164-1212(84)90005-0},
tags = { algebra},
researchr = {https://researchr.org/publication/MarkowitzR84},
cites = {0},
citedby = {0},
journal = {Journal of Systems and Software},
volume = {4},
number = {2-3},
pages = {147-162},
}