@article{10_1017_S001708950003086X,
     author = {Cohn, J. H. E.},
     title = {On the {Diophantine} equation z2 = x4 + {Dx2y2} + y4},
     journal = {Glasgow mathematical journal},
     pages = {283--285},
     year = {1994},
     volume = {36},
     number = {3},
     doi = {10.1017/S001708950003086X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950003086X/}
}