pxs2nex(1) on Linux
The text 5c9dee909055, as Debian 12 (Bookworm) shipped it.
manual page for pxs2nex 1.3
Flags it lists
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--citation -
--help -
--outf -
--seqf -
--uppercase -
--version -
-C -
-V -
-h -
-o -
-s -
-u