Computational science and its applications – ICCSA 2019 19th International conference, Saint Petersburg, Russia, July 1-4, 2019 : proceedings : part II - Misra, Sanjay 1971-; Gervasi, Osvaldo 1957-; Murgante, Beniamino 1965-; Stankova, Elena; Korkhov, Vladimir; Torre, Carmelo Maria 1966-; Rocha, Ana Maria A.C; Taniar, David 1963-; Apduhan, Bernady O.; Tarantino, Eufemia (Springer, 2019)