@article{SM_2013_204_7_a5,
     author = {A. Ya. Helemskii},
     title = {Metric freeness and projectivity for classical and quantum normed modules},
     journal = {Sbornik. Mathematics},
     pages = {1056--1083},
     publisher = {mathdoc},
     volume = {204},
     number = {7},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2013_204_7_a5/}
}