TY - RPRT TI - The uniform asymptotic swallowtail approximation - Practical methods for oscillating integrals with four coalescing saddle points AU - Connor, J. N. L. AU - Curtis, P. R. AU - Farrelly, D. PY - 1984 UR - https://ntrs.nasa.gov/citations/19840040799 ID - 19840040799 ER -