@article{Dershowitz-Zaks/80,
AUTHOR = {Dershowitz, Nachum and Zaks, Shmuel},
TITLE = {Enumerations of ordered trees},
JOURNAL = {Discrete Math.},
VOLUME = {31},
PAGES = {9-28},
YEAR = {1980},
PUBLISHER = {North-Holland Publishing Company},
ADDRESS = {Amsterdam-New York-Oxford-Tokyo},
}
@article{Seymour/80,
AUTHOR = {Seymour, P.D.},
TITLE = {Disjoint paths in graphs},
JOURNAL = {Discrete Math.},
VOLUME = {29},
PAGES = {293-309},
YEAR = {1980},
PUBLISHER = {North-Holland Publishing Company},
ADDRESS = {Amsterdam-New York-Oxford-Tokyo},
}