R. D. Middlebrook, S. Ćuk: A general unified approach to modelling switching-converter power stages. In: Proceedings of the IEEE Power Electronics Specialists Conference, June 8 – 10, 1976, Cleveland, OH. 1976, S.73–84 (Vorabdruck als PDF [abgerufen am 5. Juli 2010]).
Change in Boardroom. ChartNexus – Investor Relations, 30. Juni 2011, abgerufen am 27. April 2022: „In 1983, he joined LH Research, an American switching power supply company based in Prai, Penang and HQ in California, in the U.S. He was with LH Research for a total of 9 years and was also responsible for managing LH Research factories in the Caribbean (Puerto Rico and Dominican Republic) for approximately 3 years as General Manager.“
W. Hersom: Optimizing the High Current Transistor Converter. In: Solid State Power Conversion. 1. Jahrgang, März 1975 (electronicdesign.com).
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worldwide.espacenet.com
Patent US4292665: Output Stage for Switching Regulated Power Supply. Angemeldet am 14. Januar 1980, veröffentlicht am 29. September 1981, Anmelder: LH Research, Tustin, Calif., Erfinder: Wallace N. Hersom, Tustin; John E. Crum, Mission Viejo, both of Calif.
Alumni Award For Distinguished Service. University of Illinois at Urbana-Champaign, The Grainger College of Engineering, abgerufen am 27. April 2022: „In March 1994, he was appointed president and chief executive officer of LH Research, Inc. LH Research is a leading manufacturer of power supplies to the instrument, computer, copier, and capital equipment industries.“
Beck Ellman Heald: The San Diego Foundation names Hal Orr As Chief Financial & Investment Officer. Patch Media, 30. August 2011; abgerufen im 1. Januar 1: „Additionally, Orr served as Chief Financial Officer and Vice President of Operations at LH Research, Inc. in Costa Mesa, a privately owned $40 million designer, manufacturer, and distributor of AC/DC switching power supplies with more than 1,000 employees and serving a worldwide market. His responsibilities included accounting, MIS, manufacturing, purchasing, test engineering, and forecast and master scheduling for foreign and US locations.“
Existing Class two Directors whose Terms expire in 2016. United States Securities and Exchange Commission, 2015, abgerufen am 27. April 2022: „He was President and Chief Executive Officer of LH Research, Inc. from 1994–1996“
Top merchant suppliers to U.S. market – Switching Power Supplies (Ranked by 1983 sales). In: Electronic Business. 10. Jahrgang, Nr.4–7. Cahners Publishing Company, 1984, ISSN0163-6197, S.24, 124.
Beginning with nothing in the way of experience. In: Asian American identity Jade magazine. 4–5. Jahrgang. Jade Publications, 1981, ISSN0147-8230, S.12.
Today, LH Research is the world's largest dedicated manufacturer of regulated switching power supplies. In: Electronic design. 35. Jahrgang. Hayden Pub. Co., 1987, ISSN0013-4872, S.186.
The World's Largest Manufacturer of Switching Regulated Power Supplies. In: Digital Design. 14. Jahrgang. Benwill Publishing Corporation, 1984, ISSN0147-9245, S.73.
