@article{10_4064_aa124_4_3,
     author = {Gihan Marasingha},
     title = {On the representation of almost primes by
 pairs of quadratic forms},
     journal = {Acta Arithmetica},
     pages = {327--355},
     publisher = {mathdoc},
     volume = {124},
     number = {4},
     year = {2006},
     doi = {10.4064/aa124-4-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa124-4-3/}
}