1. Ganti, H., Menon, S.K., Niemeyer, K.,E., Hagen, C.L., Effects of Oil and Water Contamination on the Operation of a Natural Gas Internal Combustion Engine, Journal of Natural Gas Science and Engineering, Volume 41, May 2017, Pages 30-39, ISSN 1875-5100, http://doi.org/10.1016/j.jngse.2017.02.038.

2. Deng, Y., Menon, S.K., Lavrich, Z., Wang, H., Hagen, C.L., Design, Simulation, and Testing of a Novel Micro-Channel Heat Exchanger for Natural Gas Cooling in Automotive Applications, Applied Thermal Engineering, Volume 110, January 2017, Pages 327–334, doi: 10.1016/j.applthermaleng.2016.08.193.

3. Daly, S., Niemeyer, K.E., Cannella, W.J., Hagen, C.L., Predicting Fuel Research Octane Number using Fourier-Transform Infrared Absorption Spectroscopy of Neat Hydrocarbons, accepted for publication by Fuel. Volume 183, 1 November 2016, Pages 359–365, doi:10.1016/j.fuel.2016.06.097.

4. Daly, S.R., Olson, N. Hagen, C.L., Fourier-Transform Infrared Absorption Spectroscopy in Binary Hydrocarbon-Alcohol Single Droplet Evaporation, Journal of Spectroscopy, vol. 2016, Article ID 3619634, 7 pages, 2016. doi:10.1155/2016/3619634.

5. Elgin, R.C., Hagen, C.L., A Semi-Empirical CNG Tank Filling Model Created for a Novel SelfRefueling Vehicle System, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, published online, January 2016, doi: 10.1177/0954407015623409.

6. Malakoutirad, M., Bradley, T.H., Hagen, C.L., Design Considerations for an Engine-Integral Reciprocating Natural Gas Compressor, Applied Energy, Volume 156, 2015, pp. 129-137, ISSN 0306- 2619.

7. Elgin, R.C., Hagen, C.L., Development and Operation of a Self-Refueling Compressed Natural Gas Vehicle, Applied Energy, Volume 155, 2015, pp. 242-252, ISSN 0306-2619.

8. Niemeyer, K.E., Daly, S.R., Cannella, W.J., Hagen, C.L., Investigation of the LTC Fuel Performance Index for Oxygenated Reference Fuel Blends, Fuel, Volume 155, 2015, pp. 14-24.

9. Niemeyer, K.E., Daly, S R., Cannella, W.J., Hagen, C.L., A Novel Fuel Performance Index for LTC Engines Based on Operating Envelopes in Light-Duty Driving Cycle Simulations, ASME Journal of Engineering for Gas Turbines and Power, 2015, Volume 137, Issue 10 p.101601.

10. Hagen, C.L., Lee, B.C., Franka, I.S., Rath, J.L., VandenBoer, T.C., Roberts, J.M., Brown, S.S., and Yalin, A.P., Cavity Ring-Down Spectroscopy Sensor for Detection of Hydrogen Chloride, Atmospheric Measurement Techniques, Volume 7, 2014, pp. 345–357. Curriculum Vitae Christopher L. Hagen p.4.

11. Kranendonk, L.A., Caswell, A.W., Hagen, C.L., Neuroth, C.T., Shouse, D.T., Gord, J.R., Sanders, S.T., Temperature Measurements in a Gas-Turbine-Combustor Sector Rig Using Swept-Wavelength Absorption Spectroscopy, Journal of Propulsion and Power 2009, Volume 25, Issue 4, pp. 859-863.

12. Hagen, C.L., Sanders, S.T., Investigation of Multi-Species (H2O2 and H2O) Sensing and Thermometry in an HCCI Engine by Wavelength-Agile Absorption Spectroscopy, Measurement Science & Technology 2007, Volume 18, Issue 7, 1992-1998.

13. Hagen, C.L., Sanders, S.T., Toward Hyperspectral Sensing in Practical Devices: Measurements of Fuel, H2O and Gas Temperature in a Metal Homogeneous Charge Compression Ignition Engine, Journal of Near Infrared Spectroscopy, Volume 15, Issue 4, 2007, pp. 217-225.

14. Hagen, C.L., Schmidt, J.R., Sanders, S.T., Spectroscopic Sensing via Dual-Clad Optical Fiber, IEEE Sensors Journal, Volume 6, Issue 5, 2006, pp. 1227-1231.

15. Hagen, C.L., Walewski, J.W., Sanders, S.T., Generation of a Continuum Extending to the Midinfrared by Pumping ZBLAN Fiber with an Ultrafast 1550-nm Source, IEEE Photonics Technology Letters, Volume28, Issues 1-4, 2006, pp. 91-93.

16. Walewski, J.W., Filipa, J.A., Hagen, C.L., Sanders, S.T., Standard Single-Mode Fibers as Convenient Means for the Generation of Ultrafast High-Pulse-Energy Super-Continua, Applied Physics B-Lasers and Optics Volume 83, Issue 1, 2006, pp. 75-79.