@article{10_4064_aa96_2_4,
     author = {Qin Yue and Keqin Feng},
     title = {The 4-rank of the tame kernel versus the 4-rank
of the narrow class group in quadratic number fields},
     journal = {Acta Arithmetica},
     pages = {155--165},
     publisher = {mathdoc},
     volume = {96},
     number = {2},
     year = {2000},
     doi = {10.4064/aa96-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa96-2-4/}
}