@article{GDZPPN002346001, title = {Paraconvex Sets.}, journal = {Mathematica Scandinavica}, volume = {7}, year = {1959}, pages = {372-376}, zbl = {0093.12001}, url = {http://dml.mathdoc.fr/item/GDZPPN002346001} }
Michael, Ernest. Paraconvex Sets.. Mathematica Scandinavica, Tome 7 (1959) pp. 372-376. http://gdmltest.u-ga.fr/item/GDZPPN002346001/