Blum, P. W.; Schuchardt, K. G. H. (24 June 1976). "Exospheric zonal winds between 540 and 620 km from the orbit of Explorer 24". Planetary and Space Science. 24 (6): 529. Bibcode:1976P&SS...24..529B. doi:10.1016/0032-0633(76)90131-8.
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Jacchia, L. G.; Slowey, J. (1966). "The Shape and Location of the Diurnal Bulge in the Upper Atmosphere". SAO Special Report. 207. Bibcode:1966SAOSR.207.....J.
Blum, P. W.; Schuchardt, K. G. H. (24 June 1976). "Exospheric zonal winds between 540 and 620 km from the orbit of Explorer 24". Planetary and Space Science. 24 (6): 529. Bibcode:1976P&SS...24..529B. doi:10.1016/0032-0633(76)90131-8.