On the Goursat problem for a second order equation. Tarama, Shigeo — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]
Lateral estimates for iterated elliptic operators and analyticity. Tarama, Shigeo — 2009 Electronic Journal of Differential Equations (EJDE) [electronic only]
Energy estimate for wave equations with coefficients in some Besov type class. Tarama, Shigeo — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]