1. High power gasdynamically cooled carbon monoxide laser
2. M. Schellhorn and H. v. Biilow, "Deep penetration welding using a CO laser with unstable resonator", accepted for publication in Optics and LaserTechnology(1995). 161 M. Schellborn, TO laser welding - a u' comparative study to C02 laser welding", Colloque Mecanique et Optique, SociCtk FranGaise des Mecaniciens,SFM,Courbevoic,France, (1995)