@article{DIA_1982__8__A2_0,
     author = {Sain, I.},
     title = {Weak products for universal algebra and model theory},
     journal = {Diagrammes},
     note = {talk:2},
     pages = {S1--S15},
     publisher = {Universit\'e Paris 7, Unit\'e d'enseignement et de recherche de math\'ematiques},
     volume = {8},
     year = {1982},
     mrnumber = {780445},
     zbl = {0525.08002},
     language = {en},
     url = {http://www.numdam.org/item/DIA_1982__8__A2_0/}
}