@article{10_1017_S2040618500033906,
     author = {Cassels, J. W. S.},
     title = {On a problem of {Rankin} about the {Epstein} zeta-function},
     journal = {Glasgow mathematical journal},
     pages = {73--80},
     year = {1959},
     volume = {4},
     number = {2},
     doi = {10.1017/S2040618500033906},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033906/}
}