E. W. Backer, W. Ehrfeld, D. Münchmeyer, H. Betz, A. Heuberger, S. Pongratz, W. Glashauser, H. J. Michel, R. v. Siemens,
Production of separation-nozzle systems for uranium enrichment by a combination of X-ray lithography and galvanoplastics Naturwissenschaften. ,vol. 69, pp. 520- 523 ,(1982) ,
10.1007/BF00463495