IPG Photonics Corporation (IPGP) CEO Valentin Gapontsev on Q4 2019 Results - Earnings Call TranscriptSeeking Alpha • 02/13/20
IPG Photonics (IPGP) Expected to Beat Earnings Estimates: Should You Buy?Zacks Investment Research • 02/06/20
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IPG Photonics Corp (IPGP) CEO Valentin Gapontsev on Q3 2019 Results - Earnings Call TranscriptSeeking Alpha • 10/29/19
Dr. Valentin Gapontsev and IPG Settle Litigation with US Treasury over Congressional ReportGlobeNewsWire • 09/11/19