@article{MS2_1995__76_2_167334,
     author = {Juan J. Garcia and Angel del Rio},
     title = {On {Flatness} and {Projectivity} of a {Ring} as a {Module} over a {Fixed} {Subring.}},
     journal = {Mathematica Scandinavica},
     pages = {179--193},
     publisher = {mathdoc},
     volume = {76},
     number = {2},
     year = {1995},
     zbl = {0842.16023},
     url = {http://geodesic.mathdoc.fr/item/MS2_1995__76_2_167334/}
}