@article{PORMA_1987__44_2_115575,
     author = {Horadam, A.F.},
     title = {Generalization of a result of {Morgado}},
     journal = {Portugaliae mathematica},
     pages = {131--136},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {1987},
     mrnumber = {0911436},
     zbl = {0631.10005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1987__44_2_115575/}
}