@article{PORMA_1999__56_3_48442,
     author = {Lindstr\"om, B.},
     title = {Primitive quadratics reflected in -sequences.},
     journal = {Portugaliae mathematica},
     pages = {257--263},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {1999},
     zbl = {0939.11012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1999__56_3_48442/}
}