http://www.circopedia.org/Special:Search?search=crystalle&fulltext=Search
https://www.crew-united.com/de/?bio=560280
http://movementdirector.crystalle.eu/movementdirector.crystalle.eu
https://g.page/movement-coach-berlin-crystalle?gm
http://www.prweb.com/releases/2014/04/prweb11777842.htm http://tinyurl.com/o2sonot