1. Allen, R. D., David, G. B., Nomarski, G.: The Zeiss-Nomarski differential interference equipment for transmitted-light microscopy. Z. wiss. Mikr.69, 193?221 (1969).
2. Hashimoto, K.: Cellular envelopes of the keratinized cells of the human epidermis. Arch. klin. exp. Derm.235, 374?385 (1969).
3. -- Formation of the marginal band, intercellular lamellae and laminated fibrils in the vermilion border of the lip. Arch. oral. Biol. (in press).
4. -- The ultrastructure of the skin of human embryos. Vi. Formation of the hair, the root sheaths and the hair canal. Arch. klin. exp. Derm. (in press).
5. -- Ultrastructure of the human toenail I. Proximal Nail Matrix. J. Invest. Derm. (in press).