Stokes Phenomenon and Matched Asymptotic Expansions. - Adri B. Olde Daalhuis; S. Jonathan Chapman; John R. King; John R. Ockendon; Richard H. Tew (SIAM J. Appl. Math., 1995)

On the Theory of Complex Rays. - S. Jonathan Chapman; James M. H. Lawry; John R. Ockendon; Richard H. Tew (SIAM Rev., 1999)

Thin-Layer Solutions of the Helmholtz and Related Equations. - John R. Ockendon; Richard H. Tew (SIAM Rev., 2012)