Guttersrud et al_Rasch analyses of data colllected in 17 countries_update 2023.pdf Waldherr, Karin; Alfers, Tobias; Peer, Sandra (2021): Development and validation of the HLS-EU-Q12 Waldherr, Karin; Alfers, Tobias; Peer Sandra; Pelikan, Jürgen (2019): Development and validation of the HLS-EU-Q12
