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Barry J. Cooper
E. Pap
Michel Chipot, Pavol Quittner
K.-D. Bierstedt, B. Fuchssteiner
Guilherme M. Penha, Luiz Adauto J. Medeiros
O.A. Oleinik, A.S. Shamaev, G.A. Yosifian
M. Pollak, B. Shklovskii
Graham Elliott, Allan Timmermann
C.J. Colbourn, M.J. Colbourn
Wiktor Eckhaus, Eduard M. De Jager
