Kostianev, S., Hristova, A., Iluchev, D. Characteristics of tidal expiratory flow pattern in healthy people and patient with chronic obstructive pulmonary disease. Plovdiv: 1999 18-25,.
Kostianev, S., Hristova, A., Iluchev, D. Characteristics of tidal expiratory flow pattern in healthy people and patient with chronic obstructive pulmonary disease. Plovdiv: 1999 18-25,.
Kostianev, S., Hristova, A., Iluchev, D. (1999) Characteristics of tidal expiratory flow pattern in healthy people and patient with chronic obstructive pulmonary disease, Plovdiv: 18-25,.
Kostianev, S., Hristova, A., & Iluchev, D. (1999). Characteristics of tidal expiratory flow pattern in healthy people and patient with chronic obstructive pulmonary disease. Plovdiv: 18-25.
Kostianev S, Hristova A, Iluchev D. Characteristics of tidal expiratory flow pattern in healthy people and patient with chronic obstructive pulmonary disease. Plovdiv: 1999. p. 18-25.