Fehsenfeld, 1967, Planet. Space Sci., 15, 373, 10.1016/0032-0633(67)90201-2
Fehsenfeld, 1968, Planet. Space Sci., 16, 701, 10.1016/0032-0633(68)90108-6
Fehseneeld, 1969, Planet. Space Sci., 17, 1759, 10.1016/0032-0633(69)90052-X
Fite, 1964, Discuss. Faraday Soc., 37, 192, 10.1039/df9643700192
Johnson, 1958, Annls. geophys., 14, 475
Narcisi, 1965, J. geophys. Res., 70, 3687, 10.1029/JZ070i015p03687
Narcisi, 1970, Adv. Electronics Electron Phys., 29, 79, 10.1016/S0065-2539(08)61090-2
Narcisi, 1970, Trans. Am. geophys. Un., 51, 366
Paul, 1958, Z. Phys., 152, 143, 10.1007/BF01327353
Peterson, 1971, Phys. Rev., A3, 1651, 10.1103/PhysRevA.3.1651
Bailey, 1966, Intr. Paper No. 95, AFCRL-66-148
Ulwick J. C. 1971 AFCRL, private communication.