Solomon, David H.; Chopra, Inder J.; Chopra, Usha; Smith, Francoise J. (1977-01-27). "Identification of Subgroups of Euthyroid Graves's Ophthalmopathy". New England Journal of Medicine. 296 (4): 181–186. doi:10.1056/nejm197701272960401. ISSN0028-4793. PMID576175.
Solomon, David H.; Chopra, Inder J.; Chopra, Usha; Smith, Francoise J. (1977-01-27). "Identification of Subgroups of Euthyroid Graves's Ophthalmopathy". New England Journal of Medicine. 296 (4): 181–186. doi:10.1056/nejm197701272960401. ISSN0028-4793. PMID576175.
Solomon, David H.; Chopra, Inder J.; Chopra, Usha; Smith, Francoise J. (1977-01-27). "Identification of Subgroups of Euthyroid Graves's Ophthalmopathy". New England Journal of Medicine. 296 (4): 181–186. doi:10.1056/nejm197701272960401. ISSN0028-4793. PMID576175.