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 Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 1—97
 Real hypersurfaces with parallely cyclic condition of a complex space form Jong Joo Kim and Yong Soo Pyo Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 1—10
 0-graphic flow Young-Key Kim Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 11—14
 A classification of certain biquadratic fields of class number 1 Hyun Kwang Kim and Yong Moo Kim Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 15—21
 On automorphisms of certain unipotent subgroups of Chevalley groups of type $D_{l}^{\ast}$ Bok Hee Im Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 23—32
 A generalization of the Brouwer fixed point theorem SeHie Park Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 33—37
 Topologically stable homeomorphisms Dong Pyo Chi, Sung Kyu Choi, Ki Shik Koo, and Jong Suh Park Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 39—49
 Testing pairs for exactness of $C^{\ast}$-algebras Tadasi Huruya and Seung Hyeok Kye Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 51—54
 On totally real submanifolds with parallel mean curvature vector of a Sasakian space form U Hang Ki and Jin Suk Pak Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 55—64
 The range of derivations on non-commutative Banach algebras Byung Do Kim and Kil-Woung Jun Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 65—68
 Area integrals associated with a measure on $R^n$ Hung Hwan Lee and Yoon Jae Yoo Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 69—75
 On the primality of the numbers $M_{k,n}$ and $N_{k,n}$ Shin Won Kang Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 77—88
 Fuzzy normality and some of its weaker forms S. P. Sinha Bull. Korean Math. Soc. 1991 Vol. 28, No. 1, 89—97