Coordinate Transformations, part 3 - Lecture 3.3 - Chemical Engineering Fluid Mechanics - YouTube
Del in cylindrical and spherical coordinates - Wikipedia
How to differentiate unit vectors of spherical coordinates - Quora
Cylindrical Coordinates -- from Wolfram MathWorld
SOLVED: A function f (x,y,z) of Cartesian coordinates can also be thought of as a function of cylindrical coordinates p,( 2 because the latter are functions of the former via the relations
Del in cylindrical and spherical coordinates - Wikipedia
Potential Equation in Polar Coordinates - YouTube
Unit vectors in cylindrical and spherical coordinates - YouTube