Semigroup structure underlying evolutions. Parker, G.Edgar — 1982 International Journal of Mathematics and Mathematical Sciences
A Picard-Maclaurin theorem for initial value PDEs. Parker, G.Edgar; Sochacki, James S. — 2000 Abstract and Applied Analysis
Some properties of solutions to polynomial systems of differential equations. Carothers, David C.; Parker, G.Edgar; Sochacki, James S.; Warne, Paul G. — 2005 Electronic Journal of Differential Equations (EJDE) [electronic only]