Mats Haugen - Encyclopaedia Metallum: The Metal Archives
Mats Haugen (Circus Maximus) best solos - YouTube
Interview of CIRCUS MAXIMUS (Mats Haugen) for the "Isolate" release
Mats Haugen - Home
CIRCUS MAXIMUS's Mats Haugen Discusses Upcoming Album, Songwriting, Progressive Metal & Tour 2014 - YouTube
Mats haugen hi-res stock photography and images - Alamy
Mats Haugen de Circus Maximus : » Sudamerica ,es sin dudas el mejor lugar donde nunca hemos tocado» – Nación Progresiva
Mats Haugen – S-ROCK
Mats Haugen | Discography | Discogs
Mats Haugen | Virtus Advokat AS
Mats Haugen | ARTISTS | Ibanez guitars
Interview with Mats Haugen (Guitars) (Circus Maximus), staying true to the foundation of the band. - Your Online Magazine for Hard Rock and Heavy Metal
Petra and Francisco | Mats Haugen | Flickr
Mats Haugen – Progradar
Interview of CIRCUS MAXIMUS (Mats Haugen) for the "Isolate" release