BenAmor, AliAliBenAmorMoussa, RafedRafedMoussaSeifert, ChristianChristianSeifert2021-12-062021-12-062021International Conference on Operator Theory (2021)http://hdl.handle.net/11420/11139enClosed formclosed operatortrace of formsMathematikA note on traces of forms with applications to the Bessel operatorConference Paper10.1515/9783110598193-005Other