1. L.Gasperini, E. Bonatti, G. Long "Lake Cheko and the Tunguska Event: impact or non-impact?", Terra Nova, Volume 20, Issue 2, pp 169-172 (April 2008) В© Blackwell Publishing Ltd.
  2. Longo G.: K izucheniyu prichin i posledstvij katastrof. In: Forum-2008, Novoye v mezhdisciplinarnyh issledovaniyah i debatah, Izd. RAN, Moskva, pp 291-302, 2008
  3. G. S. Collins et al.,  "Evidence that Lake Cheko is not an impact crater", Terra Nova, Volume 20, Issue 2, pp. 165-168, April 2008
  4. J. Kelly Beatty, Tunguska: 100 Years and Counting, Sky & Telescope, 30 June 2008
  5. Luca Gasperini, Enrico Bonati and Giuzeppe Longo, The Tunguska mystery, 2008, Scientific American 30 June 2008
  6. Кучеров В.И., Положение Солнца в момент Тунгусской катастрофы 30.06.1908 г. и солнечная природа Тунгусского космического тела, ВЕСТНИК МГСУ. т.4. c.19. 2008.