Srot, M. 1966a. Nove poznatky o zakladani sesterskeho pokoleni lykohuba sosnoveho (Myelophilus piniperda L) v borovych prorstech v ceskych zemich [New data on the establishment of a sister generaton of the pine bark-beetle (M piniperda) in pine stands in western Czechoslovakia] . Lesnicky Casopis 12:563-576.