1. A review of various optical transient effects connected with spatial dispersion is given in “Transient and Pulse Propagation in Linear Spatially Dispersive Media” by A. Puri and J.L. Birman, Ch. 22 of “Semiconductors Probed by Ultrafast Laser Spectroscopy”, Vol. II, p.331, ed. by R.R. Alfano, (Acad. Press, NY, 1984).
2. A review of the ABC problem for spatial dispersive medium is given in “Electrodynamic and Nonlocal Optical Effects Mediated By Exciton Polaritons”, by J.L. Birman, Ch. 2 of “Excitons”, ed. by E.I. Rashba and M.D. Sturge (North-Holland Publishing Company, NY, 1982).
3. S.I. Pekar, Sov. Phys. JETP 6, 785 (1958).
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