Tedder W. H., Monty M. L. Exploration of long-distance PK: a conceptual replication of the influence on a biological system // Research in parapsychology, 1980, W. G. Roll et al. Eds., Metuchen NJ: Scarecrow Press, 1981; Dossey L. Be careful what you pray for… you just might get it. Benor D. J. Healing research, spiritual healing.