Nielsen, 2002, p. 460. Nielsen, Christian Axboe (2002). One state, one nation, one king : the dictatorship of King Aleksandar and his Yugoslav project, 1929-1935 (Tesis) (en inglés). Columbia University. p. 513. OCLC422624241.
Nielsen, 2002, p. 447. Nielsen, Christian Axboe (2002). One state, one nation, one king : the dictatorship of King Aleksandar and his Yugoslav project, 1929-1935 (Tesis) (en inglés). Columbia University. p. 513. OCLC422624241.