@article{AM_1999_150_3_a12,
     author = {Sergei Merkulov and Lorenz Schwachh\"ofer},
     title = {Addendum to {''Classification} of irreducible holonomies of torsion-free affine connection''},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {150},
     number = {3},
     zbl = {900398017},
     url = {http://geodesic.mathdoc.fr/item/AM_1999_150_3_a12/}
}