Select and insert multiple bibliography entries into one \cite command with regexp search.

[Hongyi Zhao]

I noticed that the \cite command operation using reftex supports the
following options:

###########
n / p      Go to next/previous entry (Cursor motion works as well).
 g / r      Start over with new regexp / Refine with additional regexp.
 SPC        Show full database entry in other window.
 f          Toggle follow mode: Other window will follow with full db entry.
 .          Show insertion point.
 q          Quit without inserting \cite macro into buffer.
 TAB        Enter citation key with completion.
 RET        Accept current entry (also on mouse-2) and create \cite macro.
 m / u      Mark/Unmark the entry.
 e / E      Create BibTeX file with all (marked/unmarked) entries
 a / A      Put all (marked) entries into one/many \cite commands.
###########

But I still can't figure out the convenient and efficient workflow for
using regexp to select and insert multiple bibliography entries into a
\cite command.

Any hints will be highly appreciated.

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province