Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
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Librería Elías (Asturias)
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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.