Equation Icon  2 j′ Pi = MB ξiR′− -c−3q2ηiR′′+ c−1MB ξR ξkI′ 𝜖ijk + Ξi, (317 ) 3 Ξi = − c−1{MB ξk′′ξj + 1-MB (ξkξj′)′}𝜖jki + 𝒟#i ′ + Πi, R I 2 R I (mass)