Muthugala, V.Wadduwage, D.P.Wijayapala, A.Fernando, R2022-01-052022-01-052021-06Journal of the National Science Foundation of Sri Lanka,49(1):p.3-15https://dl.nsf.gov.lk/handle/1/25465COVID-19Identification of coherent groups of generators for out-of-step protection using online measurementsArticle