@article{1102983450,
author = {Comer, S. D.},
title = {Classes without the amalgamation property.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 309-318},
language = {en},
url = {http://dml.mathdoc.fr/item/1102983450}
}
Comer, S. D. Classes without the amalgamation property.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 309-318. http://gdmltest.u-ga.fr/item/1102983450/