1. The problem of establishing and sequence of superimposed lines;Mathyer;Int Crim Police Rev,1980
2. Establishing the sequence of strokes: state of art;Poulin;Int J Forensic Doc Exam,1996
3. Determining the sequence of original ink and toner printing;Novotny;J Am Soc Questioned Doc Examiners,2005
4. Determining the sequence of intersecting gel pen and laser printed strokes-a comparative study;Saini;Sci Justice,2009