@article{10_4064_aa171_2_3,
     author = {Stephan Baier and Ulrich Derenthal},
     title = {Quadratic congruences on average and
 rational points on cubic surfaces},
     journal = {Acta Arithmetica},
     pages = {145--171},
     publisher = {mathdoc},
     volume = {171},
     number = {2},
     year = {2015},
     doi = {10.4064/aa171-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa171-2-3/}
}