Examining the term yoga nidra. Birch & Hargreaves.
Yoga nidra, the future. Stephen Parker & Swami Veda Bharati.
Effect of yoga nidra on alpha EEG. Kamakhya Kumar.
Dream theory in Malaya, Kilton Stewart.
100th Monkey Revisited by James Gregory (1997)
Gaining strength by using the mind. Ranganathan.