How do I change sn-mathphys.bst in the Springnature template to sort alphabetically by author name?

Question

I am using Springer [sn-mathphys]{sn-jnl} to submit a paper to Celestial Mechanics and Dynamical Astronomy (CMDA). I noticed they require references to be alphabetically ordered by author's last name. However, the literature seems to be sorted by citation order rather than last name. It appears that [sn-basic]{sn-jnl} would fulfil my request, but this format omits the decimal point in the journal abbreviation ".". I need to cite my literature using the [sn-mathphys] format, but I want him to be listed by last name; how do I do that? This is the download address for the template：https://www.springernature.com/gp/authors/campaigns/latex-author-support

This is the format of the CMDA

The format of [sn-mathphys]{sn-jnl} in the SpringerNature template is similar but not sorted alphabetically by the author's last name.

Another [sn-basic]{sn-jnl} format is as follows:

It could list them in last name order, but the journal abbreviations and the dot in the author's name "." disappeared.

Answer 1

It seems that your question is a duplicate of this one : Problem with Springer Nature bibliography style （citation style: numbered, sort in alphabetical order）

I was struggling to get the same result and finally managed to make it work. So I provide also my answer here, using part of the template sn-basic.bst, in hope it may be useful for someone else.

In sn-mathphys.bst, insert just after the line REVERSE {reverse.pass}, the function bib.sort.order contained in sn-basic.bst. In my case, it consists in 14 lines starting by FUNCTION {bib.sort.order} and ending in 'sort.key$ := and }.

Then you can use \documentclass[sn-mathphys,Numbered]{sn-jnl} in your document, as specified in the template, and it should work.