The stochastic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e3893" altimg="si252.svg"><mml:mi>θ</mml:mi></mml:math>-SEIHRD model: Adding randomness to the COVID-19 spread
Communications in nonlinear science and numerical simulation/Communications in nonlinear science & numerical simulation