@article{MM2_1980__33_154749,
     author = {S. Basarab and V. Nica},
     title = {Approximation {Properties} and {Existential} {Completeness}  for {Ring} {Morphisms.}},
     journal = {Manuscripta mathematica},
     pages = {227--282},
     publisher = {mathdoc},
     volume = {33},
     year = {1980},
     zbl = {0472.13013},
     url = {http://geodesic.mathdoc.fr/item/MM2_1980__33_154749/}
}