Özkan, Muazzez, Mutlu Güçsav, Damla Unat, Ömer Unat, Mukaddes Özgen, Erdal İlhan, Dilara Özdemir, Onur Akçay, and Orhan Meral. 2026. “Fixed Ratio Versus Z-score/LLN Interpretation in Spirometry: Effects on Ventilatory Pattern Classification”. Proceedings of the Bulgarian Academy of Sciences 79 (9). Sofia, Bulgaria:1246–1253. https://doi.org/10.7546/CRABS.2026.09.11.