TY  - BOOK
AU  - Girlich,E.
AU  - Kovalev,M.
AU  - Nalivaiko,V.
TI  - A Note an extension of Facet-Defining Digraphs
PY  - 1998///
CY  - Magdeburg
PB  - Otto von Guericke Universitat
N1  - bibliogr
ER  -