Changes of evening exposure to electronic devices during the COVID-19 lockdown affect the time course of sleep disturbances
Federico Salfi, Giulia Amicucci, Domenico Corigliano, Aurora D’Atri, Lorenzo Viselli, Daniela Tempesta, Michele Ferrara

Spontaneous slow oscillation—slow spindle features predict induced overnight memory retention
Fereshteh Dehnavi, Ping Chai Koo-Poeggel, Maryam Ghorbani, Lisa Marshall

Measuring sleep regularity: theoretical properties and practical usage of existing metrics
Dorothee Fischer, Elizabeth B Klerman, Andrew J K Phillips