1. Army focused research team on functionally graded armor composites;Chin;Mat Sci Eng A,1999
2. Development of functionally graded sintered hard materials;Tsuda;Powder Metall,1996
3. Concept and P/M fabrication of functionally gradient materials;Kawasaki;Ceram Int,1997
4. Gradient materials: an overview of a novel concept;Neubrand;Z Metallkd,1997
5. Öztaş MK, Sarıkan B, Übeyli M, Camuşçu N, Keleş Ö. Production of the functionally gradient material based on an aluminum alloy. In: The eleventh international scientifically-practical conference, Saint Petersburg, Russian Federation, 2011. p. 283–5.