@article{ARM_1973_9_2_a3,
     author = {Shafaat, Ahmad},
     title = {Remarks on quasivarieties of algebras},
     journal = {Archivum mathematicum},
     pages = {67--71},
     year = {1973},
     volume = {9},
     number = {2},
     mrnumber = {0354503},
     zbl = {0292.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1973_9_2_a3/}
}