Halfen, D.T.  (2007).  Development of Laboratories for Teaching Basic Chemical Prinicples Using Techniques of Radio Astronomy.  233rd Meeting of the American Chemical Society, Chemical Evolution: Chemical Change Across Space and Time.  Chicago, IL.

Halfen, D.T.  (2007).  Developement of Laboratories for Teaching Chemical Principles Using Radio Astronomy.  Chemical Evolution I: Chemical Change Across Space and Time.  ACS Symposium Series.

Halfen, D.T.  (2006).  The Remarkable Molecular Spectrum of SgrB2(N).  19th Rocky Mountain Regional Meeting of the American Chemical Society.  Tucson, AZ.

Halfen, D.T., Apponi, A.J., Woolf, N., Polt, R. & Ziurys, L.M.  (2006).  A Systematic Study of Glycolaldehyde in Sagittarius B2(N) at 2 and 3 mm: Criteria for Detecting Large Interstellar Molecules.  Ap. J., 639:237.

Apponi, A.J., Hoy, J.J., Halfen, D.T., Ziurys, L.M. & Brewster, M.A.  (In Press, 2006).  Hydroxyacetone (CH3COCH2OH): A Combined Microwave/Millimeter-Wave Laboratory Study and Associated Astronomical Search.  Ap. J..

Apponi, A.J., Halfen, D.T., Ziurys, L.M., Hollis, J.M., Remijan, A.J. & Lovas, F.J.  (2006).  Investigating the Limits of Chemical Complexity in Sagittarius B2(N): A Rigorous Attempt to Confirm 1,3-Dihydroxyacetone.  Ap. J., 643:L29.

Halfen, D.T., Apponi, A.J., Polt, R., Woolf, N. & Ziurys, L.M.  (Submitted, 2005).  A systematic study of glycolaldehyde in SgrB2(N) at 2 and 3 millimeters: criteria for detecting 'natural products' in space.  The Astrophysical Journal.

Apponi, A.J., Halfen, D.T., Ziurys, L.M., Turner, B.E. & Hollis, J.M.  (In Preparation, 2005).  Millimeter wave observations of ethylene glycole, vinyl alcohol and dihydroxyacetone towards Sgr B2(N).