Wharton KA, Yedvobnick B, Finnerty VG, Artavanis-Tsakonas S (1985). "opa: a novel family of transcribed repeats shared by the Notch locus and other developmentally regulated loci in D. melanogaster". Cell. 40 (1): 55–62. doi:10.1016/0092-8674(85)90308-3. PMID2981631. S2CID9951524.
Wharton KA, Yedvobnick B, Finnerty VG, Artavanis-Tsakonas S (1985). "opa: a novel family of transcribed repeats shared by the Notch locus and other developmentally regulated loci in D. melanogaster". Cell. 40 (1): 55–62. doi:10.1016/0092-8674(85)90308-3. PMID2981631. S2CID9951524.
Wharton KA, Yedvobnick B, Finnerty VG, Artavanis-Tsakonas S (1985). "opa: a novel family of transcribed repeats shared by the Notch locus and other developmentally regulated loci in D. melanogaster". Cell. 40 (1): 55–62. doi:10.1016/0092-8674(85)90308-3. PMID2981631. S2CID9951524.