1. Researches on the physiology of formation and germination of turions in Spirodela polyrhiza (L.) Schleiden;Czopek;Acta Biol. Cracov. Ser. Bot.,1959
2. The oligodynamic action of light on the germination of turions of Spirodela polyrhiza (L.) Schleiden;Czopek;Acta Soc. Bot. Polon.,1962
3. Studies on the external factors inducing the formation of turions in Spirodela polyrhiza (L.) Schleiden;Czopek;Acta. Soc. Bot. Polon.,1963
4. The action of kinetin, gibberellic acid and red light on the germination of turions of Spirodela polyrhiza;Czopek;Bul. Acad. Polon. Sc.,1964
5. Corrélations de croissance entre frondes chez les Lemnacées;Guern;Ann. Sc. Nat. Bot.,1965