+++2 статьи sciencedirect

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1. Synthesis of propylene glycol methyl ether over amine modified porous silica by ultrasonic technique
Catalysis Communications, Volume 8, Issue 3, March 2007, Pages 437-441
Xuehong Zhang, Wenyu Zhang, Junping Li, Ning Zhao, Wei Wei, Yuhan Sun

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http://dx.doi.org/10.1016/j.catcom.2006.07.013

2. Solid base and their performance in synthesis of propylene glycol methyl ether
Journal of Molecular Catalysis A: Chemical, Volume 231, Issues 1-2, 20 April 2005, Pages 83-88
Wenyu Zhang, Hui Wang, Wei Wei, Yuhan Sun

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http://dx.doi.org/10.1016/j.molcata.2004.12.025

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