{{Cite journal| doi = 10.3390/biology11010125| issn = 2079-7737| volume = 11| issue = 1| pages = 125| last1 = Davahli| first1 = Mohammad Reza| last2 = Karwowski| first2 = Waldemar| last3 = Fiok| first3 = Krzysztof| last4 = Murata| first4 = Atsuo| last5 = Sapkota| first5 = Nabin| last6 = Farahani| first6 = Farzad V.| last7 = Al-Juaid| first7 = Awad| last8 = Marek| first8 = Tadeusz| last9 = Taiar| first9 = Redha| title = The COVID-19 Infection Diffusion in the US and Japan: A Graph-Theoretical Approach| journal = Biology| date = 2022-01-13| pmid = 35053123| pmc = PMC8773348}}