Petrova DI, Bojikova V. Development of two data bases with comments in Bulgarian language and application of supervised learning approaches on them for comparative sentiment analysis. А brief overview. ГТУВ [интернет]. 31 Декември 2022 [цитиран 17 Ноември 2025];6(2):57-62. достъпен на: https://aj.tu-varna.bg/index.php/ajtuv/article/view/261