@article{10_4064_aa153_3_4,
     author = {Kostadinka Lapkova},
     title = {Class number one problem for real quadratic fields
 of a certain type},
     journal = {Acta Arithmetica},
     pages = {281--298},
     publisher = {mathdoc},
     volume = {153},
     number = {3},
     year = {2012},
     doi = {10.4064/aa153-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa153-3-4/}
}