András Hajnal, Vera T. Sós. Paul Erdös is seventy. Journal of Graph Theory, 7(4):391-393, 1983. [doi]
@article{HajnalS83,
title = {Paul Erdös is seventy},
author = {András Hajnal and Vera T. Sós},
year = {1983},
doi = {10.1002/jgt.3190070403},
url = {http://dx.doi.org/10.1002/jgt.3190070403},
researchr = {https://researchr.org/publication/HajnalS83},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {7},
number = {4},
pages = {391-393},
}