Ohkuma Structures. - Michèle Giraudet; W. Charles Holland (Order, 2002)

Semi-Ohkuma Chains. - W. Charles Holland; Matatyahu Rubin (Order, 2004)

The Conjugacy Problem and Related Problems in Lattice-Ordered Groups. - W. Charles Holland; Boaz Tsaban (Int. J. Algebra Comput., 2005)

Lexicographic exponentiation of chains. - W. Charles Holland; Salma Kuhlmann; Stephen H. McCleary (J. Symb. Log., 2005)

Normal Subgroups of B u Aut(Omega). - Manfred Droste; W. Charles Holland (Appl. Categorical Struct., 2007)

The Relationship of Partial Metric Varieties and Commuting Powers Varieties. - Michael R. Darnel; W. Charles Holland; Homeira Pajoohesh (Order, 2013)