@article{ZNSL_2024_537_a0,
     author = {V. I. Vasyunin},
     title = {Some extremal problems for martingale transforms. {II}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--39},
     publisher = {mathdoc},
     volume = {537},
     year = {2024},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2024_537_a0/}
}