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4. Dynamic Logic (2000) Frequency plays a significant role in lifting awareness: four or more exposures doubles the impact of online branding, in Beyond the Click: Insights from Online Advertising Research, http//www.dynamiclogic.com.
5. Dynamic Logic (2002) Bigger ads do not guarantee effectiveness, inBeyond the Click: Insights from Online Advertising Research, http://www.dynamiclogic.com.