@article{ITA_2001__35_3_287_0,
     author = {Mishra, Sounaka and Sikdar, Kripasindhu},
     title = {On the hardness of approximating some {NP-optimization} problems related to minimum linear ordering problem},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {287--309},
     publisher = {EDP-Sciences},
     volume = {35},
     number = {3},
     year = {2001},
     mrnumber = {1869219},
     zbl = {1014.68063},
     language = {en},
     url = {http://www.numdam.org/item/ITA_2001__35_3_287_0/}
}