@article{GDZPPN002025442,
title = {Sequences with Adjacent Elements Unequal},
journal = {Aequationes mathematicae},
volume = {7},
year = {1971},
pages = {256-262},
zbl = {0222.05006},
url = {http://dml.mathdoc.fr/item/GDZPPN002025442}
}
EIFLER, L.; REID, K.B. JR.; ROSELLE, D. Sequences with Adjacent Elements Unequal. Aequationes mathematicae, Tome 7 (1971) pp. 256-262. http://gdmltest.u-ga.fr/item/GDZPPN002025442/