Dober dokumentarec o spačku na you tube (angleški)
http://www.youtube.com/watch?v=gd8klplbIAw
http://www.youtube.com/watch?v=1q30zUHSK28&feature=related
http://www.youtube.com/watch?v=jOJntJYuBAQ&feature=related
http://www.youtube.com/watch?v=nbn40MO7M5U&feature=related
http://www.youtube.com/watch?v=5RPug82XrFU&feature=related
http://www.youtube.com/watch?v=SwHci0iR2As&feature=related