Development of the European Health Interview Survey - Physical Activity Questionnaire (EHIS-PAQ) to monitor physical activity in the European Union., Finger, Jonas D., Tafforeau Jean, Gisle Lydia, Oja Leila, Ziese Thomas, Thelen Juergen, Mensink Gert B. M., and Lange Cornelia , Arch Public Health, 2015, Volume 73, p.59, (2015)