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Journal of Mathematical Analysis and Applications > 2016 > 443 > 2 > 797-816
Journal of Functional Analysis > 2008 > 255 > 1 > 228-254
Czechoslovak Journal of Physics > 2005 > 55 > 11 > 1365-1370
Journal of Mathematical Analysis and Applications > 2016 > 443 > 2 > 797-816
Journal of Functional Analysis > 2008 > 255 > 1 > 228-254
Czechoslovak Journal of Physics > 2005 > 55 > 11 > 1365-1370