A role of lower semicontinuous functions in the combinatorial complexity of geometric problems. - Jerzy W. Jaromczyk; Grzegorz Swiatek (J. Complex., 1991)

A Theory of Even Functionals and Their Algorithmic Applications. - Jerzy W. Jaromczyk; Grzegorz Swiatek (Theor. Comput. Sci., 1996)