@article{JOLT_2011_21_1_a1,
     author = {T. B. Madsen and A. Swann},
     title = {Invariant {Strong} {KT} {Geometry} on {Four-Dimensional} {Solvable} {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {55--70},
     year = {2011},
     volume = {21},
     number = {1},
     doi = {10.5802/jolt.622},
     zbl = {1242.53093},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.622/}
}