@article{AMI_2003_30_a14,
     author = {Andrzej Schinzel},
     title = {On the congruence un \ensuremath{\equiv} c mod p, where un is a recurring sequence of the second order},
     journal = {Annales mathematicae et informaticae},
     pages = {147--165},
     year = {2003},
     volume = {30},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2003_30_a14/}
}