Tolong jelaskan mengenai Pemeran utama dari Gripsholm (film)

Detlef Kühn. "Xavier Kollers kluge und einfühlsame Tucholsky-Biographie" -- "epd Film" (Germany), Vol. 17, Iss. 11, 1 November 2000, Pg. 34

Dominik Slappnig; et al. "Tucholskys Muse: Heike Makatsch in Xavier Kollers "Gripsholm" " -- Bern: Stämpfli, 2000.