Rapp, Vi H., Brett C. Singer, J. Chris Stratton, Craig P. Wray, and Brennan Less."Assessment of Literature Related to Combustion Appliance Venting Systems." (2015).
Rapp, Vi H., and Brett C. Singer."Effect of Fuel Wobbe Number on Pollutant Emissions from Advanced Technology Residential Water Heaters: Results of Controlled Experiments." (2014).