The Eighty-First William Lowell Putnam Mathematical Competition. - Mark Krusemeyer; Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2021)

The Eighty-Second William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2022)

The Eighty-Third William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2023)

The Eighty-Fourth William Lowell Putnam Mathematical Competition. - Daniel H. Ullman; Paul Zeitz (Am. Math. Mon., 2024)