The original work on {HEAD ~ the correlation} between {TAIL ~ retinoic acid} and decrease in cell proliferation was done by Verma & Boutwell, Cancer Research, 1977, 37, 2196 2201 
between
The original work on { HEAD ~ the correlation } between { TAIL ~ retinoic acid } and decrease in cell proliferation was done by Verma & Boutwell , Cancer Research , 1977 , 37 , 2196 2201
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH