sentences:  New methods and subjects proposed in the study of Romanian history became the center of controversy, which involved, among others, the textbook authored by Cioroianu and other University staff (Stelian Brezeanu, Florin Müller, Mihai Sorin Rădulescu, and Mihai Retegan) for Editura RAO; the book itself was criticized for not allocating a larger segment to the Romanian Revolution of 1989, and Cioroianu later explained that the editorial choice had been imposed by the level of trustworthy sources available at the time.Cioroianu was also highly critical of the methods used by adversaries of the textbooks during the overall debate, and publicly sided with the authors of arguably the most innovative manual, the one published by Editura Sigma.He repeatedly argued in favor of the authors (Sorin Mitu, Ovidiu Pecican, Lucia Copoeru, Virgiliu Ţârău, and Liviu Ţîrău), debating the issue with Marius Tucă and Octavian Paler during television appearances of that year.