@article{10_1017_S0017089500005206,
     author = {Cook, R. J.},
     title = {Indefinite quadratic polynomials},
     journal = {Glasgow mathematical journal},
     pages = {133--138},
     year = {1983},
     volume = {24},
     number = {2},
     doi = {10.1017/S0017089500005206},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005206/}
}