Computation Computation Social networks in military powers: network and sentiment analysis during the Covid-19 pandemic Quilez-Robres Alberto Universidad de Zaragoza Acero-Ferrero Marian Universidad de Zaragoza Delgado-Bujedo Diego Lozano-Blasco Raquel Universidad de Zaragoza Aiger-Valles Montserrat Universidad de Zaragoza 2023 research-article