@article{01420707,
title = {Homomorphisms of semiholonomic Verma modules: An exceptional case.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {68},
year = {1999},
pages = {257-269},
zbl = {1014.17007},
language = {en},
url = {http://dml.mathdoc.fr/item/01420707}
}
Sawon, J. Homomorphisms of semiholonomic Verma modules: An exceptional case.. Acta Mathematica Universitatis Comenianae. New Series, Tome 68 (1999) pp. 257-269. http://gdmltest.u-ga.fr/item/01420707/