"Equacions diferencials el·líptiques" . . "Równania różniczkowe." . . "Elliptische Differentialgleichung." . . . . "Distribution (Funktionalanalysis)" . . . . . . . . . . . . . . . "Partially elliptic differential equations having distributions as their right members" . "Distributionen"@en . . "Partially elliptic differential equations having distributions as their right members"@en . . . "Topologia." . .