Mladenova, S., Chakarova, L., Petrova, G. Health knowledge and risk behavior of Bulgarian pupils. Athens: Papazissis pub., 2010 991-996,.
Mladenova, S., Chakarova, L., Petrova, G. Health knowledge and risk behavior of Bulgarian pupils. Athens: Papazissis pub., 2010 991-996,.
Mladenova, S., Chakarova, L., Petrova, G. (2010) Health knowledge and risk behavior of Bulgarian pupils, Athens: Papazissis pub. 991-996,.
Mladenova, S., Chakarova, L., & Petrova, G. (2010). Health knowledge and risk behavior of Bulgarian pupils. Public health and health care in Greece and Bulgaria : The challenge of the cross-border collaboration (с. 991-996). Athens: Papazissis pub..
Mladenova S, Chakarova L, Petrova G. Health knowledge and risk behavior of Bulgarian pupils. Athens: Papazissis pub.; 2010. p. 991-996.