For citations:
Puchkova N.D. On the dispositions of two π-singular curves of degree 4, the oval of one of which coils around the oval of the other. Chebyshevskii Sbornik. 2023;24(3):56-70. (In Russ.) https://doi.org/10.22405/2226-8383-2023-24-3-56-70