Normal L-fuzzy ideals in semirings. - Young Bae Jun; Joseph Neggers; Hee Sik Kim (Fuzzy Sets Syst., 1996)

Fuzzy posets on sets. - Joseph Neggers; Hee Sik Kim (Fuzzy Sets Syst., 2001)

Fuzzy pogroupoids. - Hee Sik Kim; Joseph Neggers (Inf. Sci., 2005)

On pseudo-fuzzy linear mappings. - Hee Sik Kim; B. Monk; Joseph Neggers (Inf. Sci., 2007)

Fibonacci mean and golden section mean. - Hee Sik Kim; Joseph Neggers (Comput. Math. Appl., 2008)

Representation functions and the Neggers-Stanley condition for weight-shaped-posets. - Keumseong Bang; Hee Sik Kim; Joseph Neggers (Comput. Math. Appl., 2009)

Pseudo d-algebras. - Young Bae Jun; Hee Sik Kim; Joseph Neggers (Inf. Sci., 2009)

Strong and Ordinary d-Algebras. - Jeong Soon Han; Hee Sik Kim; Joseph Neggers (J. Multiple Valued Log. Soft Comput., 2010)

Trends, probability functions and fuzzy right ideals for d-algebras. - Kyung Joon Cha; Hee Sik Kim; Joseph Neggers (Comput. Math. Appl., 2011)

The Hypergroupoid Semigroups as Generalizations of the Groupoid Semigroups. - Jeong Soon Han; Hee Sik Kim; Joseph Neggers (J. Appl. Math., 2012)

Some Aspects of d-Units in d/BCK-Algebras. - Hee Sik Kim; Joseph Neggers; Keum Sook So (J. Appl. Math., 2012)

On linear fuzzifications of groupoids with special emphasis on BCK-algebras. - Jeong Soon Han; Hee Sik Kim; Joseph Neggers (J. Intell. Fuzzy Syst., 2013)

Hyperfuzzy subsets and subgroupoids. - Yong Lin Liu; Hee Sik Kim; Joseph Neggers (J. Intell. Fuzzy Syst., 2017)

A new soft union set: characterizations of hemirings. - Jianming Zhan 001; Wieslaw A. Dudek; Joseph Neggers (Int. J. Mach. Learn. Cybern., 2017)

A Method to Identify Simple Graphs by Special Binary Systems. - Hee Sik Kim; Joseph Neggers; Sun Shin Ahn (Symmetry, 2018)

Almost φ-fuzzy semi-ideals in groupoids. - Hee Sik Kim; Joseph Neggers; Sun Shin Ahn (J. Intell. Fuzzy Syst., 2019)

Fuzzy Subgroups and Digraphs Induced by Fuzzy Subgroups. - Paul J. Allen; Joseph Neggers; Hee Sik Kim (TFSS, 2022)