TY - RPRT TI - On the Use of Quartic Force Fields in Variational Calculations AU - Fortenberry, Ryan C. AU - Huang, Xinchuan AU - Yachmenev, Andrey AU - Thiel, Walter AU - Lee, Timothy J. PY - 2013 UR - https://ntrs.nasa.gov/citations/20140011647 ID - 20140011647 ER -