1. J.C. ARDITTI, H.A. JUNG, “The dimension of finite and infinite comparability graphs”, J. London Math. Soc. (2) 21 (1980) 31–38.
2. M.D. ATKINSON, “Partial orders and comparison problem”, Congr. Numer. 47(1985) 77–88.
3. M.D. ATKINSON, “The complexity of orders”, same issue.
4. M.D. ATKINSON, H.W. CHANG, “Extensions of partial orders of bounded width”, Utilitas Math., Congressus Numerantium 52 (1986) 21–35.
5. A. BORODIN, L.J. GUIBAS, N.A. LYNCH, A.C. YAO, “Efficient searching using partial ordering”, Information Processing Letters, vol 12, n°2(1981) 71–74.