Sougareva, M. 1995. Marriages and divorces of the ethnic groups in Bulgaria (with the data of the last population census), Naselenie (1–2):113–23 (in Bulgarian). Sowards, S. 1996. Twenty-five lectures ...

The Construction Corps built much of Bulgaria's 20th-century infrastructure but was also used during the communist era to punish opponents of the regime and maintain control over ethnic minorities.