@article{YJOR_1996_6_2_a15,
     author = {Panayiotis Christidis and Ria Kalfakakou},
     title = {Profitability and {Productivity} in the {Greek} {Construction} {Industry}},
     journal = {Yugoslav journal of operations research},
     pages = {313 },
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1996},
     zbl = {0949.91531},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_1996_6_2_a15/}
}