%0 Journal Article
%A d'Atri, Gianfranco
%T Improved lower bounds to the travelling salesman problem
%J RAIRO - Operations Research - Recherche Opérationnelle
%D 1978
%P 369-382
%V 12
%N 4
%I EDP-Sciences
%U http://www.numdam.org/item/RO_1978__12_4_369_0/
%G en
%F RO_1978__12_4_369_0