1. The fundamental of noise generated in impact forming machine;Grigorian,1975
2. Billet expansion as a mechanism for noise production in impact forming machines;Hodgson;J. of Sound & Vib.,1975
3. Noise reduction in H.E.R.F. cropping machine;Droubi,1974
4. Performance of an acoustically designed H.E.R.F. cropping machine;Vajpayee;Inter-Noise,1977
5. The acoustic development of H.E.R.F. cropping machine;Vajpayee,1977