@article{BASM_2010_3_a9,
     author = {Valeriu Soltan},
     title = {Convex quadrics},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {94--106},
     publisher = {mathdoc},
     number = {3},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2010_3_a9/}
}