http://www.alfredo-haeberli.com/work/architecture/6-183/25hours_-_zuerich_west
http://beautiful-lands.com/posts/25hours-hotel-z%C3%BCrich-west#.Vs6-DZwrKhc
https://www.designhotels.com/hotels/switzerland/zurich/25hours-hotel-zurich-west/
http://blog.expedia.com.au/unique-sleeps-25hours-vienna/
http://www.angloitalianfollowus.com/a-masterpiece-of-peace-at-25hours-hotel-zurich-west
https://www.youtube.com/watch?v=vUGK_cFWbvU
https://www.designhotels.com/hotels/switzerland/zurich/25hours-hotel-zurich-west
http://design-milk.com/25hours-hotel-zurich-west/
http://www.urdesign.it/index.php/2013/01/21/25hours-hotel-zurich-west-by-alfredo-haberli/