@article{MM2_1972__6_154091,
     author = {Arturo A.L. Sangalli},
     title = {Une approche transformationelle \`a l'alg\`ebre universelle.},
     journal = {Manuscripta mathematica},
     pages = {177--206},
     publisher = {mathdoc},
     volume = {6},
     year = {1972},
     zbl = {0233.08005},
     url = {http://geodesic.mathdoc.fr/item/MM2_1972__6_154091/}
}