I don't have any links but this is what I do.
Throw everything, buds, leaves, stems, whatever you want to use in a blender or coffee grinder. Blend it until it's broken down really well. Then make clarified butter and simmer the mix for several hours to break down everything then strain really well with cheese cloth. You will have a very potent cannaoil/butter. You can add it to whatever you would normally make with butter. I've done this 100s of times and it works great just make sure you get all the fats out of the butter before you start to simmer the mix otherwise you will burn your batch. You can adjust the potency with each batch. I usually go with 1/4oz per pound of butter... but you can add more/less depending on the strength you want.
Edited... Make sure you don't boil it. You don't want the tempature over 180 or you'll get a burnt taste.