1. High purity CO gas separation by pressure swing adsorption method;Yokoe,1989
2. T.C. Golden, W.C. Kratz, F.C. Wilhelm, R. Pierantozzi and A. Rokicki, Eur. Pat. 0 472 180 A2, 1991.
3. High purity CO gas separation by pressure swing adsorption;Kasaya;Gas Sep. Purif.,1991
4. Carbon monoxide separation from by-product gas of a steelmaking plant;Hiwatashi;Kobelco Technol. Rev.,1987