P.  Baier, Pennerstorfer, J., Otto, L. - F., and Schopf, A., ?Online-modelling of the development and phenology of Ips typographus using the model PHENIPS and daily weather data and forecasts provided by the DWD?, Mitteilungen der Deutschen Gesellschaft fuer Allgemeine und Angewandte Entomologie, vol. 18, pp. 397-400, 2012.

P.  Baier, Pennerstorfer, J., and Schopf, A., ?PHENIPS - A comprehensive phenology model of Ips typographus (L.) (Col., Scolytinae) as a tool for hazard rating of bark beetle infestation?, Forest Ecology and Management, vol. 249, pp. 171-186, 2007.