@article{AL_2022_61_5_a0,
     author = {D. Herden and A. V. Pasi},
     title = {On the absoluteness of $\aleph_1$-freeness},
     journal = {Algebra i logika},
     pages = {523--540},
     publisher = {mathdoc},
     volume = {61},
     number = {5},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2022_61_5_a0/}
}