Surface Geometry from Cusps of Apparent Contours. - Roberto Cipolla; Gordon J. Fletcher; Peter J. Giblin (ICCV, 1995)

Class Based Reconstruction Techniques Using Singular Apparent Contours. - Gordon J. Fletcher; Peter J. Giblin (ECCV (1), 1996)

Following Cusps. - Roberto Cipolla; Gordon J. Fletcher; Peter J. Giblin (Int. J. Comput. Vis., 1997)