RT Journal Article T1 Entropy and Eigenvalues of Weakly Singular Integral-Operators A1 Kühn, Thomas A1 Cobos Díaz, Fernando PB Birkhauser Verlag SN 0378-620X YR 1988 FD 1988 LK https://hdl.handle.net/20.500.14352/57371 UL https://hdl.handle.net/20.500.14352/57371 LA eng DS Docta Complutense RD 26 ago 2025