A. Heyden, T. Düren, M. Kolkowski, and F. J. Keil, “DESIGN OF A PRESSURE SWING ADSORPTION MODULE BASED ON CARBON NANOTUBES AS ADSORBENT – A MOLECULAR MODELING APPROACH”, Hung. J. Ind. Chem., vol. 29, no. 2, pp. 95–104, Oct. 2001.