FERRAIOLI, Diego Catalano a
Michal MARVAN. The equivalence problem for generic four-dimensional metrics with two commuting Killing vectors.
Annali di Matematica Pura ed Applicata. HEIDELBERG: SPRINGER HEIDELBERG, 2020, roč. 199, č. 4, s. 1343-1380. ISSN 0373-3114. Dostupné z: https://dx.doi.org/10.1007/s10231-019-00924-y.