Recommended · for some experience
How to: Ideal Op. Amp Transfer function, Poles, Zeros, Node Voltage, Nodal Analysis
Why people recommend it
Recommended for learning to derive the transfer function of an op-amp circuit, but it assumes an ideal op-amp with infinite open-loop gain.
Watch for: Real op-amp limits are not covered
In their words
I know how to calculate the transfer function of an ideal opamp.
KingsInnerSoul on electronics.stackexchange.com, Oct 2014. CC BY-SA.