Weigelt, G.; et al, 76mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure, Astronomy and Astrophysics, May 1998, 333: L51–L54, Bibcode:1998A&A...333L..51W, arXiv:astro-ph/9805022
Weigelt, G.; et al, 76mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure, Astronomy and Astrophysics, May 1998, 333: L51–L54, Bibcode:1998A&A...333L..51W, arXiv:astro-ph/9805022