Simultaneous Systems of Differential Equations and Multi-Dimensional Vibrations (Mathematics and Physics for Science and Technology Book 4) (English Edition)
Classification and Examples of Differential Equations and their Applications (Mathematics and Physics for Science and Technology Book 9) (English Edition)
Linear Partial Differential and Difference Equations and Simultaneous Systems with Constant or Homogeneous Coefficients (Mathematics and Physics for Science and Technology) (English Edition)