@article{10_1017_S0017089500009551,
     author = {Baker, R. C. and Br\"udern, J.},
     title = {Pairs of quadratic forms modulo one},
     journal = {Glasgow mathematical journal},
     pages = {51--61},
     year = {1993},
     volume = {35},
     number = {1},
     doi = {10.1017/S0017089500009551},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009551/}
}