1. A cutting comparison;Gehring;Tunnels Tunnelling,1989
2. Increased productivity through boom-type continuous miners;Kogelmann,1982
3. New test-bed results for cutting heads on selective-cut heading machines;Kleinert;Glueckauff,1982
4. Selective-cut roadheading machines with longitudinal and transverse cutting heads;Menzel;Glueckauff,1981
5. Roadheaders characteristics and capabilities;McDermott,1988