Sharmilan, Tharaga, et al. “Classification and Identification of Volatile Organic Solvents Based on Functional Groups Using Electronic Nose”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 54, no. 3, Oct. 2020, pp. 158-73, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/11711.