Editors. "Raids from Bulgaria into Macedonia". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=19157, accessed 18 April 2014.]
After the Internal Macedonian Revolutionary Organisation is founded in Ottoman-controlled Thessaloniki in 1893, aimed at the independence of Macedonia, raids are made from Bulgaria into Macedonian territory.