@article{SM_1989_63_1_a11,
     author = {I. D. Gubeladze},
     title = {Anderson's conjecture and the maximal monoid class over which projective  modules are free},
     journal = {Sbornik. Mathematics},
     pages = {165--180},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_63_1_a11/}
}