Yampolsky was active as a musicologist and published many monographs on the violin and violinists. Yampolsky is known for his book on the history of violin in Russia, Russkoye skripichnoye iskusstvo. He compiled and edited some reference works, including the music encyclopedia Entsiklopedicheskiy muzykalny slovar and biographical dictionary of Russian and Soviet musicologists Kto pisal o muzyke.