@base . a , ; "American journal of operations research (Online)" . a . . a ; "portico" ; "Portico" . a ; "2160-8830" ; . a ; "2160-8849" ; . a , , ; , , ; "American journal of operations research" ; ; ; ; "2160-8849" ; ; ; "2160-8849" ; ; "2160-8849" ; "American journal of operations research (Online)" , "American journal of operations research" ; ; [ a ; "Preserved : 2011: 1, 2012: 2, 2013: 3, 2014: 4, 2015: 5, 2016: 6, 2017: 7, 2018: 8, 2019: 9, 2020: 10, 2021: 11" ; "Preserved" ; "2024-03-26"^^ ; "Preserved : 2011: 1(1-4), 2012: 2(1-4), 2013: 3(1-6), 2014: 4(1-6), 2015: 5(1-6), 2016: 6(1-6), 2017: 7(1-6), 2018: 8(1-6), 2019: 9(1-6), 2020: 10(1-6), 2021: 11(1-2)" ; ; [ "2160-8849" , "2160-8830" ; "American Journal of Operations Research" ; "Scientific Research Publishing" ] ; "2011/2021" ] ; "http://www.scirp.org/journal/ajor/" . a ; ; "20210206225900.0"^^ ; ; . a ; . "California" .