@article{AFST_1999_6_8_1_155_0,
     author = {Van Geel, Jan and Yanchevskii, Vyacheslav},
     title = {Indices of double coverings of genus 1 over $p$-adic fields},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {155--172},
     publisher = {Universit\'e Paul Sabatier. Facult\'e des sciences},
     address = {Toulouse},
     volume = {Ser. 6, 8},
     number = {1},
     year = {1999},
     mrnumber = {1721554},
     zbl = {0986.11036},
     language = {en},
     url = {http://archive.numdam.org/item/AFST_1999_6_8_1_155_0/}
}