| 41. | Cite a textbook or a professional journal that shows this persons work in mathematics.
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| 42. | He is a contributing editor of the professional journal Somatics.
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| 43. | He has published over one hundred articles in professional journals.
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| 44. | He frequently contributed to professional journals and trained hundreds of specialists in internal medicine.
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| 45. | He also served on the editorial boards of numerous prestigious scientific and professional journals.
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| 46. | Hence I recommended the OP to search some professional journals.
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| 47. | She published about 50 papers in peer-reviewed professional journals.
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| 48. | He frequently contributed to professional journals and served as a director of many professional organizations.
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| 49. | None of the professional journals would touch the piece.
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| 50. | Articles were written for popular magazines and professional journals.
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