Theorems analogous to those of Weierstrass and Mittag-Leffler for harmonic functions of n variables Alan S. Cover — 1966 Annales Polonici Mathematici
On point-dissipative systems of differential equations with quadratic nonlinearity. Bose, Anil K.; Cover, Alan S.; Reneke, James A. — 1991 International Journal of Mathematics and Mathematical Sciences
On point dissipative n -dimensional systems of differential equations with quadratic nonlinearity. Bose, Anil K.; Cover, Alan S.; Reneke, James A. — 1993 International Journal of Mathematics and Mathematical Sciences