Configurations of Kodaira fibers on rational elliptic surfaces. Ulf Persson — 1990 Mathematische Zeitschrift
Intervista ad Alessio Figalli Ulf Persson — 2019 Matematica, Cultura e Società. Rivista dell'Unione Matematica Italiana
Configurations of In Fibers on Elliptic K 3 Surface. Rick Miranda; Ulf Persson — 1989 Mathematische Zeitschrift
Homeomorphic non-diffeomorphic surfaces with samll invariants. Ulf Persson; C.A.M. Peters — 1993 Manuscripta mathematica