Factoring with the quadratic sieve on large vector computers / H.J.J. te Riele, W.M. Lioen, D.T. WinterOptimization of the MPQS-factoring algorithm on the Cyber 205 / W.M. Lioen, H.J.J. te Riele, D.T. WinterSolving large dense systems of linear equations on systems with virtual memory and with cache / W.M. Lioen, D.T. WinterA preliminary report on numerical operators in Algol 68 / P.W. Hemker & D.T. WinterOn the zeros of the Riemann zeta function in the critical strip, IV / J. van de Lune, H.J.J. te Riele, D.T. Winter