1. NEDO (New Energy and Industrial Technology Development Organization) Leaflet '95–'96, Sunshine 60, 3-1-1 Higashi-Ikebukuro, Toshima-ku, Tokyo 170, Japan.
2. ACTA (Advanced Chemical Processing Technology Research Association) Leaflet, 10-6 Hisamatsu-cho Nihonbashi, Chuuo-ku, Tokyo 103, Japan.
3. Amorphization of Nd15Fe77B8alloy ingots by mechanical grinding