@article{JTNB_2008__20_1_183_0, author = {Marcin Mazur and Stephen V. Ullom}, title = {Unit indices and cohomology for biquadratic extensions of imaginary quadratic fields}, journal = {Journal de Th\'eorie des Nombres de Bordeaux}, pages = {183--204}, publisher = {Universit\'e Bordeaux 1}, volume = {20}, number = {1}, year = {2008}, doi = {10.5802/jtnb.621}, zbl = {pre05543196}, mrnumber = {2434163}, language = {en}, url = {https://jtnb.centre-mersenne.org/articles/10.5802/jtnb.621/} }