@article{01494262, title = {On }, journal = {Annales Academiae Scientiarum Fennicae. Mathematica}, volume = {25}, year = {2000}, pages = {477-486}, zbl = {0957.30023}, language = {en}, url = {http://dml.mathdoc.fr/item/01494262} }
Dyakonov, Konstantin M.; Girela, Daniel. On . Annales Academiae Scientiarum Fennicae. Mathematica, Tome 25 (2000) pp. 477-486. http://gdmltest.u-ga.fr/item/01494262/