no. 3
An upper bound for the shortest hamiltonian path in the symmetric euclidean case
RAIRO - Operations Research - Recherche Opérationnelle, Tome 17 (1983) no. 3, pp. 297-306. 
@article{RO_1983__17_3_297_0,
     author = {Tomescu, Ioan},
     title = {An upper bound for the shortest hamiltonian path in the symmetric euclidean case},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {297--306},
     publisher = {EDP-Sciences},
     volume = {17},
     number = {3},
     year = {1983},
     mrnumber = {727267},
     zbl = {0524.05042},
     language = {en},
     url = {http://www.numdam.org/item/RO_1983__17_3_297_0/}
}
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Tomescu, Ioan. An upper bound for the shortest hamiltonian path in the symmetric euclidean case. RAIRO - Operations Research - Recherche Opérationnelle, Tome 17 (1983) no. 3, pp. 297-306. http://www.numdam.org/item/RO_1983__17_3_297_0/

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