An empirical study on the economic linkage characteristics of Yangtze River port cities based on discrete second-order derivatives
Publié en ligne: 03 juin 2023
Pages: -
Reçu: 23 juin 2022
Accepté: 26 oct. 2022
© 2023 Fang Xie et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.