@article{GDZPPN002112124,
title = {Equivalence of the strengthened Hanna Neumann conjecture and the amalgamated graph conjecture.},
journal = {Inventiones mathematicae},
volume = {115},
year = {1994},
pages = {373-390},
zbl = {0809.05055},
url = {http://dml.mathdoc.fr/item/GDZPPN002112124}
}
Dicks, Warren. Equivalence of the strengthened Hanna Neumann conjecture and the amalgamated graph conjecture.. Inventiones mathematicae, Tome 115 (1994) pp. 373-390. http://gdmltest.u-ga.fr/item/GDZPPN002112124/