1. Two additional new species of Clypeocaenis Soldán, 1978 (Ephemeroptera: Caenidae) from the Western Ghats of Peninsular India
2. The Phylogenetic System of Ephemeroptera
3. Malzacher, P. (1991) Genital-morphological features in the Caenidae. In: Alba-Tercedor, J. & Sánchez-Ortega, A. (eds) Overview and Strategies of Ephemeroptera and Plecoptera. Sandhill Crane Press, Gainesville, Florida, pp. 73-85.
4. Malzacher, P. (2015) Revision of the Oriental species of the genus Caenis Stephens (Insecta: Ephemeroptera: Caenidae). Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 8, 27-47.
5. Trait evolution of the male genitalia in the speciose genus Caenis, with emphasis on forcipes structure (Insecta: Ephemeroptera: Caenidae)