@article{GDZPPN00207611X,
title = {The Congruence 2p-1 ...1 (mod p2) and Quadratic Forms with High Density of Primes.},
journal = {Elemente der Mathematik},
volume = {22},
year = {1967},
pages = {85-88},
zbl = {0154.30005},
url = {http://dml.mathdoc.fr/item/GDZPPN00207611X}
}
Karst, Edgar. The Congruence 2p-1 ...1 (mod p2) and Quadratic Forms with High Density of Primes.. Elemente der Mathematik, Tome 22 (1967) pp. 85-88. http://gdmltest.u-ga.fr/item/GDZPPN00207611X/