1. S. V. BELOV: ‘Porous metals in engineering’, 247; 1981, Moscow, Mechanical Engineering Publishing.
2. R. M. GERMAN: ‘Powder metallurgy science’, 2nd edn, 472; 1994, Princeton, NJ, MPIF.
3. R. M. GERMAN: ‘Sintering theory and practice’, 550; 1996, New York, NY, Wiley & Sons Inc.
4. H. HAUSNER and M. KUMAR: ‘Handbook of powder metallurgy’, 604; 1982, New York, NY, Chemical Publishing Co.