Kings in multipartite tournaments. - Khee Meng Koh; B. P. Tan (Discret. Math., 1995)

The diameter of an orientation of a complete multipartite graph. - Khee Meng Koh; B. P. Tan (Discret. Math., 1996)

Number of 4-kings in bipartite tournaments with no 3-kings. - Khee Meng Koh; B. P. Tan (Discret. Math., 1996)

The minimum diameter of orientations of complete multipartite graphs. - Khee Meng Koh; B. P. Tan (Graphs Comb., 1996)

The diameter of an orientation of a complete multipartite graph [Discrete Math 149 (1996) 131-139]. - Khee Meng Koh; B. P. Tan (Discret. Math., 1997)

The number of kings in a multipartite tournament. - Khee Meng Koh; B. P. Tan (Discret. Math., 1997)

On the kings and kings-of-kings in semicomplete multipartite digraphs. - B. P. Tan (Discret. Math., 2005)

On the 3-kings and 4-kings in multipartite tournaments. - B. P. Tan (Discret. Math., 2006)

On semicomplete multipartite digraphs whose king sets are semicomplete digraphs. - B. P. Tan (Discret. Math., 2008)