@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/