He also appeared at the Sweden Rock Festival in 2011 .
In 1984 , Ruffner performed at the San Francisco Blues Festival and , in 1998 , performed at the Notodden Blues Festival .
Ruffner also appeared at the Sweden Rock Festival in 2011 .
In 1984 , Ruffner performed at the San Francisco Blues Festival and , in 1998 , performed at the Notodden Blues Festival .