“…For subsequent work, see (Varadan et al, 1978), (Yang and Mal, 1994), (Bose, 1996), (Kanaun and Levin, 2003), and (Kim, 2003). For analogous plane-strain elastodynamics, see (Varadan et al, 1986), (Yang and Mal, 1994), (Bussink et al, 1995) and (Verbis et al, 2001).…”