@article{SIGMA_2017_13_a5,
     author = {Matti Raasakka},
     title = {Spacetime-Free {Approach} to {Quantum} {Theory} and {Effective} {Spacetime} {Structure}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2017},
     volume = {13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2017_13_a5/}
}