On Using Approximate Finite Differences in Matrix-Free Newton-Krylov Methods. - Peter N. Brown; Homer F. Walker; Rebecca Wasyk; Carol S. Woodward (SIAM J. Numer. Anal., 2008)

MAP-PF wideband multitarget and colored noise tracking. - Kristine L. Bell; Robert E. Zarnich; Rebecca Wasyk (ICASSP, 2010)