@article{00772739,
title = {Front-divisors of trees.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {61},
year = {1992},
pages = {69-84},
zbl = {0821.05041},
language = {en},
url = {http://dml.mathdoc.fr/item/00772739}
}
Híc, P.; Nedela, R.; Pavlíková, S. Front-divisors of trees.. Acta Mathematica Universitatis Comenianae. New Series, Tome 61 (1992) pp. 69-84. http://gdmltest.u-ga.fr/item/00772739/