{TAIL ~ Oxidative internal breaker system} with breaking {HEAD ~ activators} for viscoelastic surfactant fluids 
{ TAIL ~ Oxidative internal breaker system } with breaking { HEAD ~ activators } for viscoelastic surfactant fluids
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH