@article{10_4064_aa126_3_4,
     author = {A. Bremner and N. Tzanakis},
     title = {Lucas sequences whose $n$th term is
 a square or an almost square},
     journal = {Acta Arithmetica},
     pages = {261--280},
     publisher = {mathdoc},
     volume = {126},
     number = {3},
     year = {2007},
     doi = {10.4064/aa126-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa126-3-4/}
}