@article{MM2_1991__73_1_155670,
     author = {Maria Helena Noronha},
     title = {A note on the first {Betti} number of submanifolds with nonnegative {Ricci} curvature in codimension two.},
     journal = {Manuscripta mathematica},
     pages = {335--340},
     publisher = {mathdoc},
     volume = {73},
     number = {1},
     year = {1991},
     zbl = {0756.53022},
     url = {http://geodesic.mathdoc.fr/item/MM2_1991__73_1_155670/}
}