1. Low FN, Burkel WE: A boundary membrane concept of ultrastructural morphology. Anat Rec 151: 489–490, 1965.
2. Low FN: A boundary membrane concept of ultrastructure applicable to the total organism. Proc Third European Regional Conference on Electron Microscopy, Prague p 115–116, 1964.
3. Todd RB, Bowman W: The Physiological Anatomy and Physiology of Man. London: John W. Parker, p 404, 1845.
4. Gersh I, Catchpole HR: The organization of ground substance and basement membrane and its significance in tissue injury, disease and growth. Am J Anat 85: 457–521, 1949.
5. Hotchkiss RD: A microchemical reaction resulting in the staining of polysaccharide structures in fixed tissue preparations. Arch Bioch 16: 131–141, 1948.