Keldysh problem for mixed type equation with strong characteristic degeneration and singular coefficient
Crossref DOI link: https://doi.org/10.3103/S1066369X17080059
Published Online: 2017-07-19
Published Print: 2017-08
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Safina, R. M.
License valid from 2017-07-19