@article{JLT_2016_26_4_JLT_2016_26_4_a3,
     author = {R. Biggs and C. C. Remsing},
     title = {On the {Classification} of {Real} {Four-Dimensional} {Lie} {Groups}},
     journal = {Journal of Lie theory},
     pages = {1001--1035},
     year = {2016},
     volume = {26},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/JLT_2016_26_4_JLT_2016_26_4_a3/}
}