1. Ahvenainen P, Kassamakov I, Hanhijärvi K et al (2010) Csi Helsinki: Swli in forensic science: comparing tool marks of diagonal cutting pliers. Rev Quant Non-Destr Eval 29:2084–2091
2. Berx V, Kinder JD (2002) A 3D view on the ‘crossing lines’ problem in document examination. In: Proc. SPIE 4709, pp 102–110
3. Berx V, Kinder JD (2005) The application of profilometry in the analysis of the line crossings. J Am Soc Quest Doc Exam 8:1–8
4. Bojko K, Roux C, Reedy BJ (2008) An examination of the sequence of intersecting lines using attenuated total reflectance Fourier transform infrared spectral imaging. J Forensic Sci 53:1458–1467
5. Cheng KC, Chao CH, Jeng BS, Lee ST (1998) A new method of identifying writing sequence with the laser scanning confocal microscope. J Forensic Sci 43:348–352