1-A. Ahmadi, S. M. Beck, “The Swirling Orifice Plate, a Flowmeter for all Reasons”, ASME Fluid Engineering Summer conference, 19-23 June, 2005, Houston, Texas, USA,

2-A. Ahmadi, S. M. Beck, “Experimental study of the orifice plate with a cone swirler flow conditioner”, The 13 Annual (International) Conferences of Mechanical Engineering, 17-19 May , 2005,  Isfahan, Iran,