@article{BASM_2008_1_a10,
     author = {Valery Dryuma},
     title = {On theory of surfaces defined by the first order systems of equations},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {161--175},
     publisher = {mathdoc},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2008_1_a10/}
}