1. Allen T. D., Schor S. L., Schor A. M. (1984) An ultra-structural review of collagen gels: A model system for cell matrix, cell basement membrane and cell-cell interaction. Scan. Elect. Micros. 1: 375–390
2. Arcelli C. (1981) Pattern thinning by contour tracing. Computer Graphics and Image Processing 17: 130–144.
3. Arcelli C., Sanniti di Baja G. (1987) A one pass two-operation process to detect skeletal pixels on a 4-distance transform. PAMI 1987
4. Arcelli C., Sanniti di Baja G. (1985) A width dependent fast thinning algorithm. IEEE Trans. Pattern and Machine Intelligence, PAMI-7: 463–474.
5. Berns G. S., Berns M. W. (1982) Computer based tracking of living cells. Exp, Cell Res. 142: 103–109