You can now read the scientific paper entitled “A methodology for understanding passenger flows combining mobile phone records and airport surveys: Application to Madrid-Barajas Airport after the COVID-19 outbreak” by Javier Burrieza-Galán, Rafael Jordá, Alex Gregg, Pablo Ruiz, Rita Rodríguez, Maria José Sala, Javier Torres, Pedro García-Albertos, Oliva García Cantú Ros, and Ricardo Herranz. The paper has been published in the Journal of Air Transport Management.