@article{10_1017_S0017089523000319,
     author = {Georgiou, Nikos},
     title = {Null hypersurfaces in 4-manifolds endowed with a product structure},
     journal = {Glasgow mathematical journal},
     pages = {24--35},
     year = {2024},
     volume = {66},
     number = {1},
     doi = {10.1017/S0017089523000319},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089523000319/}
}