Equation Icon  -------- ∫ [ ] W = − 2∘ GM 3a − -1--- − 3a2Q (|∇ Φ |2∕a2) + 2ν(|∇Φ |∕a )|∇ Φ |2 d3x, (36 ) 3 0 4πG 2 0 N 0 N 0 N