@article{JRAM_1975__0274_0275_151590,
     author = {Dennis A. Garbanati},
     title = {Unit signatures, and even class numbers, and relative class numbers.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {376--384},
     publisher = {mathdoc},
     volume = {0274_0275},
     year = {1975},
     zbl = {0312.12015},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__0274_0275_151590/}
}