1. Alcock, James
Give the null hypothesis a chance. Reasons to remain doubtful about the existence of Psi.
2. Dean, Geoffrey; Kelly, Ivan W.
Is astrology relevant to consciousness and psi?
3. Jahn, R.; Dunne, B.; Bradish, G.; Dobyns, Y.; Lettieri, A.; Nelson, R. u.a.
Mind/Machine Interaction Consortium: PortREG Replication Experiments.