For citations:
Bulanova A.A., Bukreeva E.B., Kistenev Yu.V., Nikiforova O.Yu. Diagnosis of chronic obstructive pulmonary disease using opticoacoustic analysis. PULMONOLOGIYA. 2015;25(1):45-49. (In Russ.) https://doi.org/10.18093/0869-0189-2015-25-1-45-49