The following publications are possibly variants of this publication:
- On upper bound graphs with forbidden subposetsHiroshi Era, Kenjiro Ogawa, Satoshi Tagusari, Morimasa Tsuchiya. endm, 22:107-111, 2005. [doi]
- A note on construction of upper bound graphsHiroshi Era, Shin-ichi Iwai, Kenjiro Ogawa, Morimasa Tsuchiya. endm, 11:284-291, 2002. [doi]