@article{IM2_2016_80_3_a3,
     author = {M. D. Kovalev},
     title = {The determinant of the stress matrix and restorability of hinged frameworks from self-stresses},
     journal = {Izvestiya. Mathematics},
     pages = {500--522},
     year = {2016},
     volume = {80},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2016_80_3_a3/}
}