00375nam a2200145Ia 4500082002000000100002200020245002700042260003500069300002700104490004700131490003400178500000500212700000500217856000700222  a512.7bAl437.RE  aAlling, Norman L.  aReal elliptic curvesb  aAmsterdambNorth-Hollandc1981  axi, 349p. Index, Bibl.  aNorth-Holland Mathematics studies v v. 54  aNotas de Mathematicav no. 81  a  a  df