Oortwolk: Verskil tussen weergawes

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Verwysings
fixing doi from hijacked website, see here
Lyn 17:
|title=The fundamental role of the Oort cloud in determining the flux of comets through the planetary system
|author=V. V. Emelyanenko, D. J. Asher, M. E. Bailey
|url=http://www.blackwell-synergy.com/doi/abs.org/10.1111/j.1365-2966.2007.12269.x
|year=2007
|journal=Monthly Notices of the Royal Astronomical Society