F. C. Langbein, S. G. Schirmer, K. Organtzoglou. The PIDS Algorithm. Technical Report, Mathematical Institute A, Stuttgart University, 1995.
Department of Mathematics, Stuttgart University, Germany.
Sophie G Schirmer
Department of Physics, College of Science, Swansea University, Wales, UK.
Frank C Langbein
School of Computer Science, Cardiff University, Cardiff, UK.