@article{GDZPPN002352036,
title = {On the Degrees of Universal Regressive Isols.},
journal = {Mathematica Scandinavica},
volume = {32},
year = {1973},
pages = {145-164},
zbl = {0275.02040},
url = {http://dml.mathdoc.fr/item/GDZPPN002352036}
}
Ellentuck, Erik. On the Degrees of Universal Regressive Isols.. Mathematica Scandinavica, Tome 32 (1973) pp. 145-164. http://gdmltest.u-ga.fr/item/GDZPPN002352036/