@article{CSIS_2011_8_2_a1,
     author = {Barrett R. Bryant and Jeff Gray and Marjan Mernik and Peter J. Clarke and Robert B. France and Gabor Karsai},
     title = {Challenges and {Directions} in {Formalizing} the {Semantics} of {Modeling} {Languages}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2011_8_2_a1/}
}