Thomas PC, Parker JW, McFadden LA, Russell CT, Stern SA, Sykes MV, Young EF (September 2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–6. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID16148926.
Ralph Neuhäuser; Markus Mugrauer; และคณะ (2008). "Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion". Astronomy and Astrophysics. 484 (1): 281–291. Bibcode:2008A&A...484..281N. doi:10.1051/0004-6361:20078493.
Bobrowsky, Matthew (1994). "Narrowband HST Imagery of the Young Planetary Nebula Henize 1357". The Astrophysical Journal. 426: L47–L50. Bibcode:1994ApJ...426L..47B. doi:10.1086/187336.
Carl R. Nave. "Neutron Absorption Cross-sections". Hyperphysics. สืบค้นเมื่อ 2008-12-04. (area for 20 GeV about 10 × 10−42 m2 gives effective radius of about 2 × 10−21 m; for 250 GeV about 150 × 10−42 m2 gives effective radius of about 7 × 10−21 m)
Thomas PC, Parker JW, McFadden LA, Russell CT, Stern SA, Sykes MV, Young EF (September 2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–6. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID16148926.
Ralph Neuhäuser; Markus Mugrauer; และคณะ (2008). "Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion". Astronomy and Astrophysics. 484 (1): 281–291. Bibcode:2008A&A...484..281N. doi:10.1051/0004-6361:20078493.
Bobrowsky, Matthew (1994). "Narrowband HST Imagery of the Young Planetary Nebula Henize 1357". The Astrophysical Journal. 426: L47–L50. Bibcode:1994ApJ...426L..47B. doi:10.1086/187336.
Thomas PC, Parker JW, McFadden LA, Russell CT, Stern SA, Sykes MV, Young EF (September 2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–6. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID16148926.
Carl R. Nave. "Neutron Absorption Cross-sections". Hyperphysics. สืบค้นเมื่อ 2008-12-04. (area for 20 GeV about 10 × 10−42 m2 gives effective radius of about 2 × 10−21 m; for 250 GeV about 150 × 10−42 m2 gives effective radius of about 7 × 10−21 m)