<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Dear Colleagues,<div>I imagine the two articles that I describe in my posting at the IUCr’s Forum will be of interest to the MX community.</div><div>See:- <a href="https://forums.iucr.org/viewtopic.php?f=39&t=427">https://forums.iucr.org/viewtopic.php?f=39&t=427</a> </div><div>All best wishes,</div><div>John<div><div dir="ltr">Emeritus Professor John R Helliwell DSc<div><br></div><div><div><br></div></div><div><br></div></div></div></div></body></html>