| Chemical process equipment: selection and design JR Couper Gulf professional publishing, 2005 | 1005 | 2005 |
| Solid–liquid mixing VA Atiemo‐Obeng, WR Penney, P Armenante Handbook of industrial mixing: Science and practice, 543-584, 2003 | 119 | 2003 |
| Advanced impeller geometry boosts liquid agitation JB Fasano, A Bakker, WR Penney Chemical Engineering 101 (8), 110, 1994 | 76 | 1994 |
| Gas absorption and gas–liquid system design JR Fair, DE Steinmeyer, WR Penney, BB Crocker Engineering handbook. New York: McGraw-Hill, 1997 | 66 | 1997 |
| Production of biodiesel fuel from tall oil fatty acids via high temperature methanol reaction K White, N Lorenz, T Potts, WR Penney, R Babcock, A Hardison, ... Fuel 90 (11), 3193-3199, 2011 | 65 | 2011 |
| Equipment for distillation, gas absorption, phase dispersion, and phase separation HZ Kister, PM Mathias, DE Steinmeyer, WR Penney, BB Crocker, JR Fair McGraw-Hill, 2008 | 61 | 2008 |
| Liquid-gas systems JR Fair, DE Steinmeyer, WR Penney, BB Crocker Perry's Chemical Engineers' Handbook Sixth Edition, pages, 18.1-18.88, 1984 | 61 | 1984 |
| Heat transfer from an oscillating horizontal wire to water FK Deaver, WR Penney, TB Jefferson | 57 | 1962 |
| Costs of individual equipment JR Couper, WR Penney, JR Fair, SM Walas Chemical process equipment, 663-669, 2005 | 50 | 2005 |
| Avoid blending mix-ups JB Fasano, WR Penney Chemical engineering progress 87 (10), 56-63, 1991 | 38 | 1991 |
| Close-Clearance Agitators—Part 2. Heat Transfer Coefficients WR Penney, KJ Bell Industrial & Engineering Chemistry 59 (4), 47-54, 1967 | 38* | 1967 |
| Scale-up methods for fast competitive chemical reactions in pipeline mixers RA Taylor, WR Penney, HX Vo Industrial & engineering chemistry research 44 (16), 6095-6102, 2005 | 35 | 2005 |
| Chemical Engineer’s Handbook JR Fair, DE Steinmeyer, WR Penney, BB Crocker Section 14, 1351-1449, 1997 | 31 | 1997 |
| Heat transfer from an oscillating horizontal wire to water and ethylene glycol WR Penney, TB Jefferson | 28 | 1966 |
| An experimental investigation to determine a scale-up method for fast competitive parallel reactions in agitated vessels SK Tipnis, WR Penney, JB Fasano AIChE Symposium Series 90 (299), 78-91, 1994 | 27 | 1994 |
| Mixing and agitation JR Couper, WR Penney, JR Fair, SM Walas Chemical Process Equipment 3, 273-324, 2010 | 26 | 2010 |
| Cut reaction by-products by proper feed blending JB Fusano Chem. Eng. Prog., 46-52, 1991 | 25 | 1991 |
| Heat transfer in a thermal processor agitated with a fixed clearance thin flat blade WR Penney, KJ Bell Chem. Eng. Progr. Symp. Ser 65 (92), 1-11, 1969 | 20 | 1969 |
| Backmixing into reactor feedpipes caused by turbulence in an agitated vessel MC Jo, WR Penney, JB Fasano AIChE Symposium Series 90 (299), 41-49, 1994 | 16 | 1994 |
| Heat exchanger PW Roy US Patent 3,407,871, 1968 | 16 | 1968 |
