Symmetric Inequality: 11199. - Aliyev Yakub; David B. Leep (Am. Math. Mon., 2007)

Estimates of the Pythagoras number of I through lattice points and polytopes. - David B. Leep; Colin L. Starr (Discret. Math., 2008)

Further improvements to the Chevalley-Warning theorems. - David B. Leep; Rachel L. Petrik (Finite Fields Their Appl., 2023)

A correction and further improvements to the Chevalley-Warning theorems. - David B. Leep; Rachel L. Petrik (Finite Fields Their Appl., 2024)