Author = Lutz Volkmann
Number of Articles: 32
Some remarks on the signed total Italian $k$-domination number of graphs

Articles in Press, Accepted Manuscript, Available Online from 01 September 2025

10.22049/cco.2025.30398.2452

Lutz Volkmann

Weak signed total double Roman $k$-domination number of graphs

Articles in Press, Accepted Manuscript, Available Online from 06 September 2026

10.22049/cco.2026.31439.2851

Jafar Amjadi; Zahra Nayebi; Lutz Volkmann

Weak signed total Italian domination in digraphs

Volume 11, Issue 4, December 2026, Pages 1081-1091

10.22049/cco.2025.30748.2606

Lutz Volkmann

Upper bounds for $[1,2]$-domination number in trees

Volume 11, Issue 4, December 2026, Pages 1163-1174

10.22049/cco.2026.31357.2831

J. Amjadi; M. Ebadi; Seyed Mahmoud Sheikholeslami; L. Volkmann

Weak signed double Roman domination in graphs

Volume 11, Issue 3, September 2026, Pages 739-756

10.22049/cco.2024.30016.2268

Lutz Volkmann

Disproof of two conjectures on proper 2-dominating sets in graphs

Volume 11, Issue 2, June 2026, Pages 713-715

10.22049/cco.2024.29967.2244

Mustapha Chellali; Lutz Volkmann

Total double Roman domination stability in graphs

Volume 11, Issue 1, March 2026, Pages 247-258

10.22049/cco.2025.30402.2453

Ziqiang Xu; Saeed Kosari; Mina Esmaeili; Aysha Khan; Lutz Volkmann

Restrained double Roman domatic number

Volume 10, Issue 3, September 2025, Pages 617-625

10.22049/cco.2024.28703.1678

Lutz Volkmann

Quasi total double Roman domination in trees

Volume 9, Issue 1, March 2024, Pages 159-168

10.22049/cco.2023.29008.1809

Maryam Akhoundi; Aysha Khan; Jana Shafi; Lutz Volkmann

Independent Italian bondage of graphs

Volume 8, Issue 4, December 2023, Pages 649-664

10.22049/cco.2023.28662.1657

Saeed Kosari; Jafar Amjadi; Aysha Khan; Lutz Volkmann

Signed total Italian domination in digraphs

Volume 8, Issue 3, September 2023, Pages 457-466

10.22049/cco.2022.27700.1318

Lutz Volkmann

Total restrained Roman domination

Volume 8, Issue 3, September 2023, Pages 575-587

10.22049/cco.2022.27628.1303

Jafar Amjadi; Babak Samadi; Lutz Volkmann

Outer-independent total 2-rainbow dominating functions in graphs

Volume 8, Issue 2, June 2023, Pages 431-444

10.22049/cco.2022.27753.1344

Akram Mahmoodi; Lutz Volkmann

Signed total Italian k-domination in graphs

Volume 6, Issue 2, December 2021, Pages 171-183

10.22049/cco.2020.26919.1164

Lutz Volkmann

Bounds on the outer-independent double Italian domination number

Volume 6, Issue 1, June 2021, Pages 123-136

10.22049/cco.2020.26928.1166

Farzaneh Azvin; Nader Jafari Rad; Lutz Volkmann

Weak signed Roman domination in graphs

Volume 5, Issue 2, December 2020, Pages 111-123

10.22049/cco.2019.26598.1123

Lutz Volkmann

Nonnegative signed total Roman domination in graphs

Volume 5, Issue 2, December 2020, Pages 139-155

10.22049/cco.2019.26599.1124

Nasrin Dehgardi; Lutz Volkmann

A note on the Roman domatic number of a digraph

Volume 5, Issue 1, June 2020, Pages 19-26

10.22049/cco.2019.26419.1107

Lutz Volkmann; D. Meierling

Communications in Combinatorics and Optimization

Journal Archive