@article{01868922,
title = {Some remarks on integral graphs with maximum degree four.},
journal = {Novi Sad Journal of Mathematics},
volume = {31},
year = {2001},
pages = {19-25},
zbl = {1007.05072},
language = {en},
url = {http://dml.mathdoc.fr/item/01868922}
}
Balińska, Krystyna T.; Simić, Slobodan K. Some remarks on integral graphs with maximum degree four.. Novi Sad Journal of Mathematics, Tome 31 (2001) pp. 19-25. http://gdmltest.u-ga.fr/item/01868922/