@ARTICLE {33106,
author={S. Rosa and D. F. M. T. Torres},
doi={10.3390/axioms11040170},
journal={Axioms},
title={Fractional Modelling and Optimal Control of COVID-19 Transmission in Portugal},
year={2022},
month={April},
volume={11},
number={4},
pages={1-15},
ISSN={}
}