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Mathematical Methods in the Applied Sciences > 44 > 18 > 14316 - 14327
Mathematische Nachrichten > 292 > 12 > 2496 - 2521
Demonstratio Mathematica > 2019 > Vol. 52, nr 1 > 410--427
Acta Mathematica Hungarica > 2019 > 159 > 1 > 109-123
Russian Mathematics > 2019 > 63 > 4 > 31-43
Russian Physics Journal > 2019 > 62 > 1 > 49-54
Siberian Mathematical Journal > 2018 > 59 > 6 > 1094-1099
Annals of Global Analysis and Geometry > 2019 > 55 > 3 > 575-589
Mediterranean Journal of Mathematics > 2018 > 15 > 4 > 1-13
The Journal of Geometric Analysis > 2019 > 29 > 2 > 1744-1762
Functional Analysis and Its Applications > 2018 > 52 > 2 > 83-92
Journal of Pseudo-Differential Operators and Applications > 2018 > 9 > 3 > 487-494
Archiv der Mathematik > 2018 > 111 > 1 > 47-55
Advances in Computational Mathematics > 2018 > 44 > 5 > 1673-1686
Journal of Geometry > 2018 > 109 > 1 > 1-10
Acta Mathematica Hungarica > 2018 > 154 > 1 > 252-263
Journal of Applied Analysis > 2017 > Vol. 23, nr 2 > 65--71
Lobachevskii Journal of Mathematics > 2017 > 38 > 6 > 1042-1049
Topology and its Applications > 2017 > 230 > C > 338-352
Complex Analysis and Operator Theory > 2018 > 12 > 7 > 1537-1548