Valantiejus, A. 2010. Historical Comparative Sociology of Zenonas Norkus: an Analysis of Unachieved Possibilities of Early Lithuanian Empire. Sociologija. Mintis ir veiksmas. 27, (Dec. 2010), 205–257. DOI:https://doi.org/10.15388/SocMintVei.2010.2.6114.