with Sergio Albeverio, Raphael Høegh-Krohn and Helge Holden: " Solvable Models in Quantum Mechanics", 2nd edition, AMS-Chelsea Series, Amer.
with Fritz Gesztesy and Barry Simon: Zeros of the Wronskian and renormalized oscillation theory, Am.
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The title of his thesis supervised by Fritz Gesztesy was Spectral Theory for Jacobi Operators (1995).
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with Fritz Gesztesy, Helge Holden and Johanna Michor: Soliton Equations and their Algebro-Geometric Solutions, Volume 2 (1+1 dimensional discrete models), Cambridge Studies in Advanced Mathematics Bd.114, Cambridge University Press 2008, ISBN 978-0-521-75308-1
with Fritz Gesztesy, Raphael Høegh-Krohn, Helge Holden: Solvable Models in Quantum Mechanics, Springer 1988, 2nd ed.
Fritz Lang | Fritz Leiber | Fritz Kreisler | Fritz Weaver | Fritz Reiner | Fritz Haber | Robert Fritz | Robert C. Fritz | Fritz Gesztesy | Fritz Dreisbach | Chris Fritz | L'amico Fritz | Fritz London | Fritz Laves | Fritz Kranefuss | Fritz Grünbaum | Dennis Fritz | Fritz von Opel | Fritz | Fritz Wunderlich | Fritz Walter | Fritz Vahrenholt | Fritz Todt | Fritz Thyssen | Fritz the Cat (film) | Fritz Stern | Fritz Reuter | Fritz Odemar | Fritz Lenz | Fritz Kraemer |