On matching extendability of lexicographic products Nina Chiarelli, Cemil Dibek, Tınaz Ekim, Didem Gözüpek and Štefko Miklavič RAIRO-Oper. Res., 51 3 (2017) 857-873 Published online: 28 September 2017 DOI: 10.1051/ro/2016072