*Smart washroom experiment in Jumbo shopping center
**Based on a research done by Ediste Oy, 2015, and a study by Burke Institute, 2004, Linking measures of customer satisfaction, value, and loyalty to financial performance
*** The Comparative study of four drying methods: cotton towels, paper towels, jet air dryer and warm air dryer – A research report of the Hjelt Institute of Hygiene and Microbiology of the University of Helsinki. Kirsi Laitinen, PhD.
**** The environmentally friendly approach to hand drying. Sustainability study into cotton towels and paper. Wirtex.