TBD
John L. Lewis
Royal Institute of Technology, Stockholm, Sweden
TBD
mathscidoc:1701.332362
W. J. Trjitzinsky
Urbana, Ill, USA
TBD
mathscidoc:1701.33924
Peter D. Lax
New York University, New York, USA
TBD
mathscidoc:1701.331172
David Drasin
Purdue University, West Lafayette, IN, USA
TBD
mathscidoc:1701.331686
L. Kantorovitch
Leningrad
TBD
mathscidoc:1701.33894