Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
This book contains a collection of problems, including boundary-value problems for elliptic systems and initial-boundary-value problems for hyperbolic systems, arising in partial differential equations investigated by means of complex analysis approached in elementary ways.