Not a DOI

The resolution service at https://doi.org resolves DOIs. You have attempted to resolve core/books/radiofrequency-electronics/antennas-and-radio-wave-propagation/95B657A22ABBD5360E258D486BA1B832, which is not a DOI.

core/books/radiofrequency-electronics/antennas-and-radio-wave-propagation/95B657A22ABBD5360E258D486BA1B832 may be a Handle (DOIs are a special sort of Handle). If core/books/radiofrequency-electronics/antennas-and-radio-wave-propagation/95B657A22ABBD5360E258D486BA1B832 is a valid Handle you should be able to resolve it at https://hdl.handle.net.