@Article{ Barrera_ROMAN_SERRANO_TORRES,

author = { Antonio Barrera and PATRICIA ROMAN ROMAN and JUAN JOSÉ SERRANO PÉREZ and FRANCISCO DE ASÍS TORRES RUIZ } ,

title = { Two multi-sigmoidal diffusion models for the study of the evolution of the COVID-19 pandemic },

journal = { Mathematics },

year = { 2021 },

volume = { 9 },

pages = { 2049- },

}