@article{KYB_1991__27_5_a0,
     author = {Hor\'alek, Vratislav},
     title = {A non-orthogonal projection model for evaluating photographs recording a population of spheres lying on a flat plate},
     journal = {Kybernetika},
     pages = {393--402},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1991},
     zbl = {0749.60098},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1991__27_5_a0/}
}