@article{MS2_1978__43_166626,
     author = {S. Jondrup},
     title = {Flat and projective modules.},
     journal = {Mathematica Scandinavica},
     pages = {336--342},
     publisher = {mathdoc},
     volume = {43},
     year = {1978},
     zbl = {0406.16016},
     url = {http://geodesic.mathdoc.fr/item/MS2_1978__43_166626/}
}