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@article{ELMA_1967__22_140856, author = {Edgar Karst}, title = {The {Congruence} 2p-1 ...1 (mod p2) and {Quadratic} {Forms} with {High} {Density} of {Primes.}}, journal = {Elemente der Mathematik}, pages = {85--88}, publisher = {mathdoc}, volume = {22}, year = {1967}, zbl = {0154.30005}, url = {http://geodesic.mathdoc.fr/item/ELMA_1967__22_140856/} }
Edgar Karst. 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://geodesic.mathdoc.fr/item/ELMA_1967__22_140856/