On the Volume Formula for Hyperbolic Tetrahedra. - Yunhi Cho; Hyuk Kim (Discret. Comput. Geom., 1999)

Volume of a tetrahedron in terms of dihedral angles and circumradius. - Yunhi Cho (Appl. Math. Lett., 2000)

The volume of simplices clipped by a half space. - Yunhi Cho; Eungchun Cho (Appl. Math. Lett., 2001)

Inverse Functions of y = x1/x. - Yunhi Cho; Kyunghwan Park (Am. Math. Mon., 2001)