Nurbakova, G. S., M. A. Ivanov, N. Habyl, Z. Z. Tyulemissov, and A. Tyulemissova. “The Three Quark-Current of Delta-Isobar”. International Journal of Mathematics and Physics, vol. 8, no. 1, June 2017, pp. 38-41, doi:10.26577/ijmph.2017.v8.i1.07.