@article{SM_1997_188_10_a4,
     author = {S. N. Tronin},
     title = {Products in categories of fractions and universal inversion of homomorphisms},
     journal = {Sbornik. Mathematics},
     pages = {1521--1541},
     publisher = {mathdoc},
     volume = {188},
     number = {10},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1997_188_10_a4/}
}