IOP IOP Conference Series: Materials Science and Engineering. -- Vol. 661, Iss. 1, 28th Annual Russian-Polish-Slovak seminar on Theoretical Foundation of Civil Engineering, 9-13 September 2019, Žilina, Slovensko (2019). -- ISSN : 1757-8981. In: IOP Conference Series: Materials Science and Engineering. -- ISSN 1757-8981. -- IOP Publishing.