Mandadzhieva, S., Marinov, B., Kostianev, S. Reference values for forced expiration parameters in bulgarian children and adolescents aged 7 to 18 years. Plovdiv: 2012 29-36,.
Mandadzhieva, S., Marinov, B., Kostianev, S. Reference values for forced expiration parameters in bulgarian children and adolescents aged 7 to 18 years. Plovdiv: 2012 29-36,.
Mandadzhieva, S., Marinov, B., Kostianev, S. (2012) Reference values for forced expiration parameters in bulgarian children and adolescents aged 7 to 18 years, Plovdiv: 29-36,.
Mandadzhieva, S., Marinov, B., & Kostianev, S. (2012). Reference values for forced expiration parameters in bulgarian children and adolescents aged 7 to 18 years. Plovdiv: 29-36.
Mandadzhieva S, Marinov B, Kostianev S. Reference values for forced expiration parameters in bulgarian children and adolescents aged 7 to 18 years. Plovdiv: 2012. p. 29-36.