Importance of catalpa groups in cultural city greening in the case of Uzbekistan B Kurbaniyazov, G Berdimuratov, SH Kholova, A Safarov and K Safarov E3S Web Conf., 258 (2021) 03026 Published online: 20 May 2021 DOI: 10.1051/e3sconf/202125803026