antigravity.it

http://.www.fortunecity.it/scienza/equazione/0  made by DOTT. ENRIOCO VALBONESI

 BISMUTO news force of energy 

http://.www.hardevidence.com/bbs/mesy/45 direttory del sito

http://.www.hardevidence.com/         generale

 N.A.S.A. official site of news sistem propulsion

http://WWW.ASTP.msfc.nasa.gov/astppont.html     particolare

http://WWW.ASTP.msfc.nasa.gov/  generico