@article{10_4064_aa97_4_2,
     author = {Xiaolei Dong and Zhenfu Cao},
     title = {Diophantine equations and class numbers
of real quadratic fields},
     journal = {Acta Arithmetica},
     pages = {313--328},
     year = {2001},
     volume = {97},
     number = {4},
     doi = {10.4064/aa97-4-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa97-4-2/}
}