Orthogonal Decomposition of Modular Quadratic Forms. Larry J. Gerstein — 1972 Inventiones mathematicae
A remark on the quadratic analogue of the Quillen-Suslin theorem. Larry J. Gerstein — 1982 Journal für die reine und angewandte Mathematik
Indecomposable integral quadratic forms over global function fields Larry J. Gerstein — 2000 Acta Arithmetica