-Calculus: Stewart, Apostol.
-Linear Algebra: Lay, Friedberg.
-Vectorial calculus: Marsden-Tromba.
-Differential equations: Zill, Tenenbaum.
-Complex variable: Ahlfors.
-Probability and Statistics: Evans.
-Topology: Munkres.
-Analysis: Sherbert, Apostol.
-Physics: Sears.
-Thermodynamics: Callen.
-Programming Language: C, by Ivor Horton and Herbert Schildt.
-Mechanics: Landau-Lifshitz.
-Abstract Algebra: Fraleigh.
-Differential geometry: Do Carmo.
-Galois theory: Rotman.
-Electromagnetism: Reitz.
-Optics: Hecht.
-Quantum Physics: Eisberg.
-Electric circuits: Nilsson.

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