found: Schweizer, Sebastian A. Easy does it: CRO, die Maske und der ganze Rest, 2014:back cover (CRO is a rapper, producer, and designer)
found: Wikipedia, viewed January 27, 2016:Cro (Singer) (Carlo Waibel, better known by his stage name Cro; born January 31, 1990; German rapper, singer, producer and designer; represented by Chimperator Productions; he describes his music as a mixture between pop and rap, which he calls "Raop"; he wears a panda mask when performing)
found: DnB in VIAF, viewed January 27, 2016(authorized access point: Cro, 1992- ; German rapper)
found: RERO (Library Network of Western Switzerland) in VIAF, viewed January 27, 2016(authorized access point: Cro, 1990- )