@article{TM_2012_277_a15,
     author = {Graham M. Reeve and Vladimir M. Zakalyukin},
     title = {Singularities of the affine chord envelope for two surfaces in four-space},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {230--242},
     publisher = {mathdoc},
     volume = {277},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_2012_277_a15/}
}