@article{10_4153_S0008439523000942,
     author = {Petkov, Igor and Salimov, Ruslan and Stefanchuk, Mariia},
     title = {Nonlinear {Beltrami} equation: lower estimates of {Schwarz} lemma{\textquoteright}s type},
     journal = {Canadian mathematical bulletin},
     pages = {533--543},
     year = {2024},
     volume = {67},
     number = {3},
     doi = {10.4153/S0008439523000942},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439523000942/}
}