@article{10_4064_aa146_1_1,
     author = {S. Hambleton and F. Lemmermeyer},
     title = {Arithmetic of {Pell} surfaces},
     journal = {Acta Arithmetica},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {146},
     number = {1},
     year = {2011},
     doi = {10.4064/aa146-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa146-1-1/}
}