1. Altman, P.L., Dittmer, D.S.: Biology Data Book. 2nd Ed. Bethesda, Md: Federation of American Societies for Exp. Bio., 1973, Vol. II, Sect. 80, Part I.
2. Berland, L.: Ordre des Opilions. In: Traite de Zoologie (Grasse, P.P. ed.) Paris: Masson et Cie, 1949, Vol. VI, pp. 761-793.
3. Bishop, S.C.: The life of a harvestman. Nature Mag. 276, 264–267 (1950).
4. Blum, M.S., Edgar, A.L.: 4-Methyl-3-heptanone: identification and role in opilionid exocrine secretions. Insect Biochem. 1, 181–188 (1971).
5. Blum, M.S., Padovani, F., Amante, E.: Alkanones and terpenes in the mandibular glands of Atta species. Comp. Biochem. Physiol. 26, 291–299 (1968).