Middlebrook's original 1976 paper on input filter interactions. Make sure you design your filter properly to avoid interactions with your switching power supply.

S.S. Kelkar's original 1982 dissertation on feedforward control. This is the first known attempt at controlling the input filter with the converter cell. 

There are many causes for apparent instability in a controller, not just a lack of phase margin in the loop.

PSRR becomes a major problem with poorly-designed control loops.

Point-of-load converters are prone to unusual results when considering the input filter design with low value capacitors.

Point-of-load converter loops need to measured as they push the state-of-the-art in crossover frequencies.

Free downloadable software shows the characteristics of the current-mode buck-boost (flyback) converter.

Free downloadable software shows the characteristics of the current-mode buck-boost (flyback) converter. 

Free downloadable software shows the characteristics of the current-mode boost converter.

Free downloadable software shows the characteristics of the voltage-mode boost converter.

Free downloadable software shows the characteristics of the current-mode buck converter.

Free downloadable software shows the characteristics of the voltage-mode buck converter.

A short summary of the important features of current-mode control, and links to the definitive free book on the topic.

Digital power is all the rage now, but don't expect it to shorten your design time, or to eliminate the need for complete optimization of the analog parts of the power supply.

The Sepic converter dc analysis is presented, showing why this is a popular converter. Beware of the ac characteristics though.