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A step-by-step guide to microphone positioning
Pete Riley - Rhythm Magazine, Mon 8 Jun 2009, 2:49 pm UTC

Firstly, miking the batter side of the drum will have more definition, while adding a second mic in front of the drum 'out of phase' (more on this shortly) will capture the ambient sound of the front head. However, the pay off for having the mic outside of the drum is more bleed from the rest of the kit and less attack than if it were placed inside.
Samson 7kit Drum Mics
Birmingham Drum Centre BDC Drum Mic Kit
Audix DP7 Drum Kit Mic