N.  Klemola, Heisswolf, A., Ammunét, T., Ruohomäki, K., and Klemola, T., ? Reversed impacts by specialist parasitoids and generalist predators may explain a phase lag in moth cycles: a novel hypothesis and preliminary field tests. ?, Annales Zoologici Fennici, vol. 46, pp. 380-393, 2009.