Borkowski, Stanislaw Servqual as instrument of services improvement and resources management. -- 1. vyd. -- Maribor : University of Maribor, 2013. -- 140 s. -- ISBN : 978-961-6562-68-3. Rosak - Szyrocka, Joanna. Čorejova, Tatiana. Šujanová, Jana, 1961-