@article{TAC_2010_23_a7,
     author = {Diana Rodelo and Tim Van der Linden},
     title = {The third cohomology group classifies double central extensions},
     journal = {Theory and applications of categories},
     pages = {150--169},
     publisher = {mathdoc},
     volume = {23},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2010_23_a7/}
}