V. S. Klimov
B. Malcolm Brown
Marchenko, V. A.
M. Thamban Nair
S. G. Mikhlin
Belal E. Baaquie
E. Bohl
Ruel Vance Churchill
George Adomian
Andrei Yu Khrennikov
Franz Rellich
Ma
M. L. Krasnov
Alberto Cialdea
Conference on Hyperbolic Equations and Related Topics (1985 University of Padova)
Yves Meyer
A. A. Pankov
Yuri I. Karlovich
Mark Krein International Conference on Operator Theory and Applications (1997 Odesa, Ukraine)
Luca Lorenzi