I would be grateful for sharing publications dealing with pre-glacial (Tertiary) plant migrations from Asia to Europe, both phylogeographic papers on particular taxa and more general discussions of migration trends.
Sorry for the delay, just found your question. For an overview of plant and animal invasions into the Mediterranean region try --
Groves RH & Di Castri F. 1991. Biogeography of Mediterranean Invasions. Cambridge University Press.
For more specific information try --
Pons A, de Beaulieu JL, Coute
aux M & Reille M. 1990. Vegetal invasions in Mediterranean Europe and North Africa from the paleoecological point of view. In: Biological Invasions in Europe and the Mediterranean basin. eds F Di Castri, AJ Hansen & M Debussche. pp51-60. Dordrecht, Kluwer.