@article{MM2_1994__82_1_155919,
     author = {Ian Connell},
     title = {Calculating {Root} {Numbers} of {Elliptic} curves over {Q.}},
     journal = {Manuscripta mathematica},
     pages = {93--104},
     publisher = {mathdoc},
     volume = {82},
     number = {1},
     year = {1994},
     zbl = {0805.14017},
     url = {http://geodesic.mathdoc.fr/item/MM2_1994__82_1_155919/}
}