1st and 2nd derivative of Normalized Associated Legendre Polynomial

I am working with spherical harmonic. To calculate that I need 1st and 2nd derivative of Normalized Associated Legendre Polynomial. But I am not finding the equations of 1st and 2nd derivative of Normalized Associated Legendre Polynomial. Can anyone help me with those equations. Also if someone give me some useful link about the equations, that would be great

Answer 1

[Matthew Cassini]

Here is a function to calculate the first derivative: https://www.mathworks.com/matlabcentral/fileexchange/46930-first-derivative-of-normal-associated-legendre-polynomials

The second derivative I have not yet found.