Библиографическая ссылка:
Cao J., Григорьян А.А. Heat Kernels and Besov Spaces Associated with Second Order Divergence Form Elliptic Operators // Journal of Fourier Analysis and Applications. 2020. Vol. 26, Iss. 1. С. 1-52 https://link.springer.com/article/10.1007/s00041-019-09708-7.