1. Historical perspective on the development of the artificial kidney;Alwall;Artif. Organs,1986
2. H. Nagano, K. Matsunami and K. Yoda, Microporous hollow synthetic fibers, Jap. Kokai 77 137 026.
3. K. Kamada, S. Sinami and K. Yoshida, Porous polypropylene hollow filaments and method of making the same, U.S. Pat. 4 055 695.
4. Mitsubishi Rayon Co., Hollow synthetic fibers, Jap. Kokai 80 137 208.