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2. Observations on the innervation of the cornea;Zander;J. Anat.,1951
3. Ueber die Nerven der Hornhaut;Hoyer;Arch. Mikrosk. Anat.,1873
4. Histology of the Human Eye. An Atlas and Textbook;Hogan,1971
5. An electron microscope study of the cornea in mice, with special reference to the innervation;Whitear;J. Anat.,1960