@article{urn:eudml:doc:43493,
title = {Homological transformations in four-dimensional space.},
journal = {Gaceta Matem\'atica},
volume = {26},
year = {1974},
pages = {77-91},
language = {en},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:43493}
}
Ernesto, C.; Lindgren, S. Homological transformations in four-dimensional space.. Gaceta Matemática, Tome 26 (1974) pp. 77-91. http://gdmltest.u-ga.fr/item/urn:eudml:doc:43493/