"Ecuaciones diferenciales lineales." . . "Rozwinięcia asymptotyczne." . . . . "Linear differential equations with variable coefficients : criteria of stability and unstability of their solutions"@en . . . "Linear differential equations with variable coefficients : criteria of stability and unstability of their solutions" . . . "Linear differential equations with variable coefficients : (criteria of stability and unstability of their solutions)"@en . "Linear differential equations with variable coefficients : (criteria of stability and unstability of their solutions)" . "Linear differential equations with variable coefficients criteria of stability and unstability of their solutions" . . . . "Linejnye differencial'nye uravneniâ s peremennymi koéfficientami" . . . "Linear differential equations with variable coefficients (criteria of stability and unstability of their solutions)" . . . . . . "Linear differential equations with variable coefficients; criteria of stability and unstability of their solutions" . . . . . . . . . . . . "Differential equations, Linear." . . "Równania różniczkowe liniowe." . . "Differentiaalvergelijkingen." . . "Équations différentielles linéaires." . . . .