Halfspace Range Search: An Algorithmic Application of k-Sets. B. Chazelle, F.P. Preparata (1986) Discrete & computational geometry
Heuristic search algorithms on directed trees Petr Lisoněk (1988) Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
How to improve efficiency of analysis of sequential data? Witold Andrzejewski, Zbyszko Królikowski, Tadeusz Morzy (2009) Control and Cybernetics