Future Space Propulsion Based on Heim's Field Theory
1992 ◽
Vol 40
(459)
◽
pp. 248-251
1969 ◽
Vol 163
(1 Second Confer)
◽
pp. 453-465
2021 ◽
Vol 11
(8)
◽
pp. 328-335
2015 ◽
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