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3. A temporary stain for Paramecium and other ciliate protozoa;Dippell;Stain Technol.,1955
4. Antigenic transformation in Paramecium aurelia after homologous antiserum treatment during autogamy and conjugation;Dryl;J. Protozool.,1959
5. Studies on the conjugation of Paramecium caudatum. V. The time of the initiation of nuclear activation;Hiwatashi;Sci. Rept. Tohoku Univ.,1955