@article{JRAM_1980__315_152233,
     author = {Ronald J. Evans},
     title = {The 2r-th power character of 2.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {174--189},
     publisher = {mathdoc},
     volume = {315},
     year = {1980},
     zbl = {0419.10003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__315_152233/}
}