{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T11:26:25Z","timestamp":1771673185487,"version":"3.50.1"},"reference-count":27,"publisher":"World Scientific Pub Co Pte Ltd","issue":"03","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Discrete Math. Algorithm. Appl."],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:p> An outer independent double Italian dominating function is a double Italian dominating function f for which the set of vertices assigned 0 under f is independent. The outer independent double Italian domination number [Formula: see text] is the minimum weight taken over all outer independent double Italian dominating functions of G. In this work, we present some contributions to the study of outer independent double Italian domination in graphs. We show that the outer independent double Italian domination number is NP-complete even when restricted to planner graphs with maximum degree at most four. We characterize the families of all connected graphs G with [Formula: see text]. We also investigate the families of all graphs G such that [Formula: see text] and for [Formula: see text], the graphs with this property are characterized. Finally, we characterize the families of all connected graphs G of order [Formula: see text], for which [Formula: see text]. <\/jats:p>","DOI":"10.1142\/s1793830922500859","type":"journal-article","created":{"date-parts":[[2022,4,13]],"date-time":"2022-04-13T06:10:18Z","timestamp":1649830218000},"source":"Crossref","is-referenced-by-count":3,"title":["Outer independent double Italian domination: Complexity, characterization"],"prefix":"10.1142","volume":"15","author":[{"given":"R.","family":"Jalaei","sequence":"first","affiliation":[{"name":"Department of Mathematics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, Iran"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9373-3390","authenticated-orcid":false,"given":"D. 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