Merge pull request #311 from openmopac/patch-bump-23.2.4

Update citation information & patch bump

Author: godotalgorithm

CITATION.cff

@@ -1,10 +1,10 @@
 cff-version: 1.2.0
-message: "If you use this software for a scientific publication, please cite it as below."
+message: "If you use this software, then please cite it. The preferred citation is its JOSS release paper, https://doi.org/10.21105/joss.08025. Alternatively, use the software citation defined by this file."
 title: MOPAC
 type: software
-version: 23.2.3
+version: 23.2.4
 doi: 10.5281/zenodo.6511958
-date-released: 2026-02-16
+date-released: 2026-04-04
 authors:
   - family-names: Moussa
     given-names: "Jonathan E."

README.md

@@ -1,6 +1,7 @@
 # Molecular Orbital PACkage (MOPAC)
 
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.08025/status.svg)](https://doi.org/10.21105/joss.08025)
 [![DOI](https://zenodo.org/badge/177640376.svg)](https://zenodo.org/badge/latestdoi/177640376)
 [![Anaconda-Server Badge](https://anaconda.org/conda-forge/mopac/badges/version.svg)](https://anaconda.org/conda-forge/mopac)
 ![build](https://github.com/openmopac/mopac/actions/workflows/CI.yaml/badge.svg)
@@ -52,5 +53,10 @@ Examples of command-line and API usage are provided in the [`/examples` folder](
 
 ## Citation
 
-The recommended citation of open-source MOPAC in scientific publications is its archival copy on Zenodo at
-[DOI:10.5281/zenodo.6511958](https://doi.org/10.5281/zenodo.6511958).
+The following paper should be cited by scientific publications that use an open-source version of the MOPAC software package:
+
+J. E. Moussa and J. J. P. Stewart, MOPAC: An open-source semiempirical molecular orbital program, *J. Open Source Softw.* **2026**, *11*(119), 8025.
+DOI:[10.21105/joss.08025](https://doi.org/10.21105/joss.08025)
+
+Alternatively, the open-source MOPAC software package can be cited directly through a software citation to its archival copy on Zenodo at
+DOI:[10.5281/zenodo.6511958](https://doi.org/10.5281/zenodo.6511958).

src/input/readmo.F90

@@ -698,8 +698,12 @@ subroutine readmo
       write (iw,"(1x,a)") "**                              MOPAC v"//verson//"                  **"
       write (iw, '(1X,a)')"**                                                                           **"
       write (iw, '(1X,a)')"*******************************************************************************"
-      write (iw, '(1X,a)')"**          Digital Object Identifier (DOI): 10.5281/zenodo.6511958          **"
-      write (iw, '(1X,a)')"**    Visit the DOI location for information on how to cite this program.    **"
+      write (iw, '(1X,a)')"** MOPAC's Digital Object Identifier: https://doi.org/10.5281/zenodo.6511958 **"
+      write (iw, '(1X,a)')"**                                                                           **"
+      write (iw, '(1X,a)')"** Please cite the open-source release paper for use of this MOPAC version:  **"
+      write (iw, '(1X,a)')"** J. E. Moussa and J. J. P. Stewart (2026)                                  **"
+      write (iw, '(1X,a)')"** MOPAC: An open-source semiempirical molecular orbital program             **"
+      write (iw, '(1X,a)')"** J. Open Source Softw., 11(119), 8025, https://doi.org/10.21105/joss.08025 **"
       write (iw, '(1X,a)')"*******************************************************************************"
       j = len_trim(keywrd)
       do i = j, 1, -1