Lurdes Sousa, \emph{Pushout stability of embeddings, injectivity and categories of algebras}, Proceedings of the Ninth Prague Topological Symposium (Prague, 2001), Topology Atlas, Toronto, 2002, pp. 295--308. arXiv:math.CT/0204140 @incollection {math.CT/0204140, author = {Sousa, Lurdes}, title = {Pushout stability of embeddings, injectivity and categories of algebras}, pages = {295--308}, booktitle = {Proceedings of the Ninth Topological Symposium (Prague, 2001)}, publisher = {Topology Atlas}, address = {Toronto}, year = {2002}, editor = {Petr Simon}, arxivnumber = {math.CT/0204140}, note = {arXiv:math.CT/0204140}, mrclass = {18A20 18A40 18B30 18G05 54B30 54C10 54C25}, }