@article{00038606, title = {Covering of radial segments for domains bounded by }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {809-812}, doi = {10.1155/S0161171291001084}, zbl = {0762.30010}, language = {en}, url = {http://dml.mathdoc.fr/item/00038606} }
Inoue, Tetsuo. Covering of radial segments for domains bounded by . International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 809-812. doi : 10.1155/S0161171291001084. http://gdmltest.u-ga.fr/item/00038606/