Layer, P.; Ebert, C.; Treskatis, S.; Weikert, T.; Willbold, E.: Glycosylated Inactive Forms of Chicken Butyrylcholinesterases and Their Possible Functions. In: Enzymes of the Cholinesterase Family, pp. 427 - 434 (Eds. Quinn, D.; Balasubramanian, A.; Doctor, B.; Taylor, P.). Springer, New York, NY, USA (1995)

Layer, P.: Cholinesterases reveal early patterns of neurogenesis in the chick. XXX. Symposion der Gesellschaft für Histochemie: Cytochemical Markers of Neural and Endocrine Cells , Gargellen, Austria, September 21, 1988 - September 24, 1988. Acta Histochemica Supplement 38, pp. 145 - 150 (1990)

Layer, P.; Makovitzky, J.: The laminar development of the embryonic chicken retina in vitro as detected by "topo-optical reactions". XXX. Symposion der Gesellschaft für Histochemie: Cytochemical Markers of Neural and Endocrine Cells , Gargellen, Austria, September 21, 1988 - September 24, 1988. Acta Histochemica Supplement 40, pp. 127 - 131 (1990)

Meinhardt, H.; Klingler, M.: Pattern formation by coupled oscillations: The pigmentation patterns on the shells of molluscs. In: Mathematical Topics in Population Biology, Morphogenesis and Neurosciences: Proceedings of an International Symposium held in Kyoto, November 10–15, 1985, pp. 184 - 198 (Eds. Teramoto, E.; Yamaguti, M.). Mathematical Topics in Population Biology, Morphogenesis and Neurosciences, Kyoto, Japan, November 10, 1985 - November 15, 1985. Springer, Berlin, Germany (1987)

Vollmer, G.; Layer, P.: Proliferation and differentiation in histotypic aggregates of embryonic chick retinal cells in the presence of pigmented epithelial (PE) cells. In Development, 82 (Supplement), p. 239. European Developmental Biology Congress 1984, Southampton, UK, September 02, 1984 - September 07, 1984. Company of Biologists, Cambridge, Cambridgeshire (1984)

Reinicke, M.; Willibold, E.; Wolburg, H.; Layer, P.: Müller Glia Endfeet and a Retinal Basal Lamina together Stabilize the Laminar Structure of Chicken Retinospheroids as Derived from the Pigmented Eye Periphery. First Syposium of the DFG-Schwerpunkt Function of Glial Cells, Topic: Regeneration, Heidelberg, Germany (1992)

Rotter, S.: Wechselwirkende stochastische Punktprozesse als Modell für neuronale Aktivität im Neocortex der Säugetiere. Dissertation, 141 pp., Thun, Frankfurt a.M., Germany (1994)