@article{10_1017_S0017089500009526,
     author = {Hooley, C.},
     title = {On ternary quadratic forms that represent zero},
     journal = {Glasgow mathematical journal},
     pages = {13--23},
     year = {1993},
     volume = {35},
     number = {1},
     doi = {10.1017/S0017089500009526},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009526/}
}