The submission with the Habilitation is known as praca habilitacyjna or dysertacja habilitacyjna. Therefore the time period dysertacja is reserved for PhD and Habilitation degrees. Many of the theses should be "defended" because of the author through a Exclusive examination for the presented degree. Examinations for PhD and Habilitation levels http://how-to-write-phd-disserta10975.suomiblog.com/detailed-notes-on-essay-on-discipline-27107295