Igwe, G.J.I. , and Smith, P.A., Effect of Increasing Needling Densities on Collection Capacity and Filtration Efficiency, Melliand Textilber.67, 624-626 (1986).
2.
Igwe, G.J.I. , and Smith, P.A., TheEffect of Depths of Needle Penetration on Dust Collection and Filtration Efficiency , Melliand Textilber.67, 703-705 (1986).
3.
Igwe, G.J.I. , and Smith, P.A., TheInfluence of Some Production Parameters on the Characteristics of Needle Felts for Air Filtration, Melliand Textilber.66, 564-566 (1985).