Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Liu, Y and Wu, C(2021). Association between the Wuhan city travel ban and the arrival time of COVID-19 in other cities. Bio-protocol Preprint. bio-protocol.org/prep802.
Tian, H., Liu, Y., Li, Y., Wu, C., Chen, B., Kraemer, M. U. G., Li, B., Cai, J., Xu, B., Yang, Q., Wang, B., Yang, P., Cui, Y., Song, Y., Zheng, P., Wang, Q., Bjornstad, O. N., Yang, R., Grenfell, B. T., Pybus, O. G. and Dye, C.(2020). An investigation of transmission control measures during the first 50 days of the COVID-19 epidemic in China . Science 368(6491). DOI: 10.1126/science.abb6105