@article{JGG_2004_8_2_JGG_2004_8_2_a2,
     author = {L. Dovnikovic },
     title = {Relativistic {Homology} as a {Way} of {Tying} or {Untying} {Singular} {Points}},
     journal = {Journal for geometry and graphics},
     pages = {151--162},
     year = {2004},
     volume = {8},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JGG_2004_8_2_JGG_2004_8_2_a2/}
}