David P. Sumner. The nucleus of a point determining graph. Discrete Mathematics, 14(1):91-97, 1976. [doi]
@article{Sumner76,
title = {The nucleus of a point determining graph},
author = {David P. Sumner},
year = {1976},
doi = {10.1016/0012-365X(76)90010-8},
url = {http://dx.doi.org/10.1016/0012-365X(76)90010-8},
researchr = {https://researchr.org/publication/Sumner76},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {14},
number = {1},
pages = {91-97},
}