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Is Baumel's work on symmetry breaking in 2D ever published?

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In Coleman's proof of Mermin-Wagner theorem, he mentioned Baumel has proved a lattice version of result and referred it as [9], but [9] says "Private communication". I wonder if Baumel's work was published at all and where to find it?

asked Aug 14, 2016 in Resources and References by Jia Yiyang (2,640 points) [ no revision ]

Probably not. The query ''author:Baumel lattice'' (without quotes) on scholar.google.com produced 5 items only, none of which applies.

commented Aug 15, 2016 by Arnold Neumaier (15,787 points) [ no revision ]

@ArnoldNeumaier, OK, good to double check. Thanks.

commented Aug 16, 2016 by Jia Yiyang (2,640 points) [ no revision ]

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