1. Polyethylene glycol as a phase transfer catalyst for aryldiazonium salt reactions
Richard A. Bartsch
Tetrahedron Letters
Volume 20, Issue 27, 1979, Pages 2503-2504
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http://dx.doi.org/10.1016/S0040-4039(01)86332-2Stephen H. Korzeniowski
Tetrahedron Letters
Volume 18, Issue 22, 1977, Pages 1871-1874
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http://dx.doi.org/10.1016/S0040-4039(01)83628-5