@article{10_4064_sm199_3_2,
     author = {Jakub Onufry Wojtaszczyk},
     title = {No return to convexity},
     journal = {Studia Mathematica},
     pages = {227--239},
     year = {2010},
     volume = {199},
     number = {3},
     doi = {10.4064/sm199-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm199-3-2/}
}