@misc{indiciaece472a66b813, title = {[Dynamic changes in the functional respiratory indices in chronic obstructive lung disease].}, author = {Kh Marinov and D Dimitrov and P Shoshkov and D Petrova and O Georgiev}, year = {1988}, url = {https://pubmed.ncbi.nlm.nih.gov/3213022/}, note = {Source identifier: 3213022} }