On the problem of development of built-up areas and improving quality of the urban environment (on the example of Ulan-Ude)Galina Zharkaia, Olga Osodoeva, Olga Sanzhina and Yuliana GunazhinovaMATEC Web Conf., 212 (2018) 04002DOI: https://doi.org/10.1051/matecconf/201821204002