I'm a powerlifter myself and I follow the same basic protocol as Bushi does with some slight modifications. I use this as active recovery and to increase my GPP. Generally I will do about 10min or moderate cardio followed by 10min of circuit training and then I will either do very light sled dragging or 10min of cardio again. I keep under 30 min total and follow it with some light stretching and mobility work. Then I hit an epson salt bath if I really feel beat down.
The circuit work will always be dictated by what workout it follows. If it follows ME Bench then it will consist of bar presses or very light DB presses for either 15-100 reps or for time. Then some tricep, shoulder, lat and forarm work. Really I use this as a feeder workout to aid in my recovery so i will generally do the same exercises that I performed on the previous day.
The goal is to increase your heart rate(perfect for cardio) and flush the muscles with blood. I do not take rests bettween stations. As far as the sled work, I will pick something that needs extra work or extra recovery and use a movement that hits that area. Everything must be done with a specific purpose in mind. I will do this workout the day after my ME work, so it will be done 2x a week. Most of the time I will also throw in one light cardio day for 30min of just walking or biking or something just to get me out of the gym.
As far as articles go, the only thing I can suggest is check out bodybuilding sites and look for articles on contest prep. that would be your best bet. Those guys generally do 30-40min 3-6x/wk from what I recal. Not good for strength but I guess it will get you leaner and prettier..lol. If strength is of greater concern, then I would check out some of the articles by Louie Simmons at West Side Barbell relating to GPP, recovery and extra workouts.
Again nothing on juicin' but many of the guys who follow these systems are 'on' and have achieved great results. I am not to familiar with martial arts training, but I know dragon door and eliteFTS have a bunch of articles on conditioning for MMA fighters. Hope that helps,