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Gill, Peter; Ivanov, Pavel L.; Kimpton, Colin; Piercy, Romelle; Benson, Nicola; Tully, Gillian; Evett, Ian; Hagelberg, Erika; Sullivan, Kevin (February 1994). "Identification of the remains of the Romanov family by DNA analysis". Nature Genetics. 6 (2): 130–135. doi:10.1038/ng0294-130. PMID 8162066.