@article{BASM_2003_3_a6,
     author = {P. V. Dovbush},
     title = {$X$-normal mappings},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {71--82},
     publisher = {mathdoc},
     number = {3},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2003_3_a6/}
}