Richardson, T.M. (1969). "Cytoplasmic and ciliary connections between the inner and outer segments of mammalian visual receptors". Vision Research. 9 (7): 727–731. doi:10.1016/0042-6989(69)90010-8. PMID4979023.
Richardson, T.M. (1969). "Cytoplasmic and ciliary connections between the inner and outer segments of mammalian visual receptors". Vision Research. 9 (7): 727–731. doi:10.1016/0042-6989(69)90010-8. PMID4979023.