@article{RMI_2007_2007_1_a32,
     author = {Avkhadiev, F. and  Wirths, K.J.},
     title = {The punishing factors for convex pairs are $2^{n-1}$.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {847-860},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2007_2007_1_a32/}
}