RT Journal Article SR Electronic T1 The search for synergy: a critical review from a response surface perspective. JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 331 OP 385 VO 47 IS 2 A1 W R Greco A1 G Bravo A1 J C Parsons YR 1995 UL http://pharmrev.aspetjournals.org/content/47/2/331.abstract AB