@article{JGG_2015_19_1_JGG_2015_19_1_a1,
     author = {D. Velichov�},
     title = {Classification of {Manifolds} {Resulting} as {Minkowski} {Operation} {Products} of {Basic} {Geometric} {Point} {Sets}},
     journal = {Journal for geometry and graphics},
     pages = {13--29},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2015},
     url = {http://geodesic.mathdoc.fr/item/JGG_2015_19_1_JGG_2015_19_1_a1/}
}