For the paper which was presented by "Zvezdan Protić", was it preprinted?
Year = 0 means this paper is preprint, or not published
SELECT CASE WHEN T1.Year = 0 THEN 'TRUE' ELSE 'FALSE' END FROM Paper AS T1 INNER JOIN PaperAuthor AS T2 ON T1.Id = T2.PaperId WHERE T2.Name = 'Zvezdan Protić' AND T1.ConferenceId = 0 AND T1.JournalId = 0