Snellgrove, Brian (2011). "Chapter 3: Perceiving the Aura". The Magic In Your Hands: How to See Auras and Use Them for Diagnosis and Healing. Ebury. pp. 31–33. ISBN9781446447314.
espacenet.com
worldwide.espacenet.com
RU patent 2061509, Grebennikov, Viktor S., "Device For Applying Energy", published 1996, assigned to Chastnoe semejnoe predprijatie Nekrasova-Luchkina "ALNI". Copy with abstract in English at RexResearch.com.
keelynet.com
Grebennikov, Viktor Stepanovich. "Chapter 5: The Natural Phenomena of AntiGravitation and Invisibility in Insects due to the Grebennikov Cavity Structure Effect (CSE)". My World. Translation posted on KeelyNet.com.
rexresearch.com
RU patent 2061509, Grebennikov, Viktor S., "Device For Applying Energy", published 1996, assigned to Chastnoe semejnoe predprijatie Nekrasova-Luchkina "ALNI". Copy with abstract in English at RexResearch.com.