(HP-67) Barkers's Equation

[Mathias Zechmeister]

For your information, my paper is accepted. A preprint is available here:
https://arxiv.org/abs/2008.02894
In Sect. 7.2., I briefly discuss Barker's equation, more as a side note. I put you, Albert Chan, in the acknowledgements.
Please let me know, if something should be adjusted (e.g. pseudonym?).