David A. Naumann. Observational purity and encapsulation. Theoretical Computer Science, 376(3):205-224, 2007. [doi]
@article{Naumann07,
title = {Observational purity and encapsulation},
author = {David A. Naumann},
year = {2007},
doi = {10.1016/j.tcs.2007.02.004},
url = {http://dx.doi.org/10.1016/j.tcs.2007.02.004},
researchr = {https://researchr.org/publication/Naumann07},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {376},
number = {3},
pages = {205-224},
}