Engineering Mathematics & Calculus
Erwin Kreyszig. Advanced Engineering Mathematics. 10th Edition. [PDF]
Dan Zwillinger. CRC Standard Mathematical Tables and Formulas. 33rd Edition. [PDF]
K.F. Riley, M.P. Hobson, S.J. Bence. Mathematical Methods for Physics and Engineering. 3rd Edition. [PDF]
Glyn James, Phil Dyke. Modern Engineering Mathematics. 6th Edition. [PDF]
OECD (2016). Problem Solving Skills. [PDF]
Differential Equations (Cheat Sheet). [PDF]