A.Raihana, M.Jayanthi, R.Deepika, C.Vinothini. 2021. “A Multilevel Deep Learning Model for Earlier Diagnosis of Covid-19 Using CNN-LSTM”. Annals of the Romanian Society for Cell Biology, April, 11623-30. http://www.annalsofrscb.ro/index.php/journal/article/view/3982.