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1von: Abou-Saif, E. A[2022], Reprint 2021, De Gruyter
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2von: Aleksandrov, L. N[2021], Reprint 2021, De Gruyter
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3von: Abdullaev, E. G[2022], Reprint 2021, De Gruyter
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4von: Agarwal, V. K[2022], Reprint 2021, De Gruyter