Timuda, C. E., Djajalaksana, S., Sugiri, J. J. R., Wardoyo, A. Y. P. and Sutanto, H. (2022) “Analysis of results of volatile organic compound (VOC) measurements using breathanalyzer on COVID-19 confirmed patients with pneumonia and without pneumonia”, International journal of health sciences, 6(S9), pp. 3899–3910. doi: 10.53730/ijhs.v6nS9.13506.