The Journal of Technika Wojskowa Historia (Military History Technique) No. 3/2013 (pp. 16-35) published an interesting article written by Mirosław Wawrzyński “Lotnictwo Jugosławii w wojnie kwietniowej 1941 r. (Yugoslavia Aviation in April War 1941”.
The text is illustrated with 34 b&w photographs of VVKJ aircraft 1940-1941. It has many pictures of aircraft captured by the Germans and Italians. In addition, there are five colors silhouettes: Bristol Blenheim I, Dornier Do 17 K, Me 109 E-3a, Ikarus IK-3/IK-Z and Dornier Do 22.
See:
http://www.magnum-x.pl/czasopismasec/twhistoria/2583
Regards,
mirekw