Problem 10819. - Olaf Krafft (Am. Math. Mon., 2000)

A Sum of Chebyshev Inequalities: 10687. - James C. Owings Jr.; Jeremy E. Dawson; Robin J. Chapman; Darryl K. Nester; Robert A. Agnew; John Beebee; David Callan; R. Garcia-Pelayo; V. Hernandez; J. Martin; J. Hickman; D. Jones; et al. (Am. Math. Mon., 2000)

A Binomial Coefficient Estimate: 10819. - Olaf Krafft; Gabriela Stanica; Pantelimon Stanica (Am. Math. Mon., 2002)

The Largest Eigenvalue of a Positive Definite Symmetric Matrix: 10839. - Beresford N. Parlett; Olaf Krafft; Martin Schaefer (Am. Math. Mon., 2002)

Diagonal-complete latin squares. - Olaf Krafft; Herbert Pahlings; Martin Schaefer (Eur. J. Comb., 2003)

Variation of a Ukrainian Olympiad Problem: 10982. - Yuming Chen; Olaf Krafft; Martin Schaefer (Am. Math. Mon., 2004)