A comparison of two upper bounds on the permanent of ( 0 , 1 ) -matrices. (Ein Vergleich zweier oberer Schranken für die Permanente von ( 0 , 1 ) -Matrizen.) Hwang, Suk-Geun; Kräuter, Arnold Richard — 1996 Séminaire Lotharingien de Combinatoire [electronic only]
A Bruhat order for the class of ( 0 , 1 ) -matrices with row sum vector R and column sum vector S . Brualdi, Richard A.; Hwang, Suk-Geun — 2005 ELA. The Electronic Journal of Linear Algebra [electronic only]
The Dittert's function on a set of nonnegative matrices. Hwang, Suk Geun; Sohn, Mun-Go; Kim, Si-Ju — 1990 International Journal of Mathematics and Mathematical Sciences