@article{GDZPPN002352680,
title = {A Change of Ring Theorem with Applications to Poincar\'e Series and Intersection Multiplicity.},
journal = {Mathematica Scandinavica},
volume = {34},
year = {1974},
pages = {167-183},
zbl = {0292.13009},
url = {http://dml.mathdoc.fr/item/GDZPPN002352680}
}
Gulliksen, Tor H. A Change of Ring Theorem with Applications to Poincaré Series and Intersection Multiplicity.. Mathematica Scandinavica, Tome 34 (1974) pp. 167-183. http://gdmltest.u-ga.fr/item/GDZPPN002352680/