Ryan, C. and Jethá, C. (2005). Universal human traits: The holy grail of evolutionary psychology (comment). Behavioral and Brain Sciences, 28 (2), 292-293.
Krippner, S. and Ryan, C. (2004). Jinns: On the road to Morocco. Dream Network, 23 (2), 34-45.
Ryan, C. (2003). Terror management theory and human sexuality. Methods (Annual edition, 2003), pp. 73-96.
Ryan, C. and Krippner, S. (2002, June/July). [Review of Mean genes: From sex to money to food, taking our primal instincts by T. Burnham & J. Phelan]. Association for Humanistic Psychology Perspective, pp. 27-29.
Jethá, C. and Ryan, C. (2002). Aspecto psicológicos del dolor. In C. Busquets & M. V. Ribera (Eds.). Unidades de dolor. Realidad hoy, reto para el futuro (Pain units. Today’s reality, tomorrow’s challenge). Barcelona, Spain: Acadèmia de Cièncieds Mèdiques de Catalunya I de Balears.
Krippner, S. and Ryan, C. (2001). Food in the Neolithic. In R.-I. Heinze (Ed.), Proceedings of the Nineteenth Annual Conference on the Study of Shamanism and Alternate Modes of Healing (pp. 217-219). Berkeley, CA: Independent Scholars of Asia.
Ryan, C. and Krippner, S. (1999). Dreams as a mirror of change in personal mythology. Dream Network, 18 (4), 32-33, 38 (also included as a chapter in SAGA, Volume II, The Best New Writing on Mythology, edited by Jonathan Young).
Krippner, S. and Ryan, C. (1999). Water spirits of the Kariri Xoco Indians of Brazil. In R.-I. Heinze (Ed.), Proceeedings of the Fifteenth International Conference on the Study of Shamanism and Alternative Modes of Healing (pp. 53-57). Berkeley, CA: Independent Scholars of Asia.
Krippner, S. and Ryan, C. (1998). Chaotic attractors in myth: Stories told by the Kariri-Xoco Indians. Dream Network, 17 (1), 30-33.
Jethá, C. and Falcato, J. (1991). A mulher e as DTS no distrito de Marracuene. Acção SIDA 9, Brochure. (Women and Sexually Transmitted Diseases in the Marracuene district.)