@article{CRMATH_2015__353_10_931_0,
     author = {Jonathan Ben-Artzi and Anders C. Hansen and Olavi Nevanlinna and Markus Seidel},
     title = {New barriers in complexity theory: {On} the solvability complexity index and the towers of algorithms},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {931--936},
     publisher = {Elsevier},
     volume = {353},
     number = {10},
     year = {2015},
     doi = {10.1016/j.crma.2015.08.002},
     language = {en},
}