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In addition, the validity of the KdV approximation is analyzed by computational means and from the corresponding KdV soliton solutions.<\/jats:p>","DOI":"10.1007\/s40314-025-03329-1","type":"journal-article","created":{"date-parts":[[2025,7,22]],"date-time":"2025-07-22T06:54:17Z","timestamp":1753167257000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Mathematical properties of Klein\u2013Gordon\u2013Boussinesq systems"],"prefix":"10.1007","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6001-3829","authenticated-orcid":false,"given":"A.","family":"Dur\u00e1n","sequence":"first","affiliation":[]},{"given":"A.","family":"Esfahani","sequence":"additional","affiliation":[]},{"given":"G. 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