Modular functions of one variable I-IV : proceedings, International Summer School, University of Antwerp, RUCA, July 17-August 3, 1972 - Kuyk, Willem (Springer-Verlag, 1973)
τ. 1. - 195 σ. - 1973 – τ. 2. - 598 σ. - 1973 – τ. 3. - 350 σ. - 1973 –