The European physical journal / C 79(3), 214 (2019). doi:10.1140/epjc/s10052-019-6702-y The European Physical Journal. C, Particles and Fields, Vol. 79, No 3 (2019) P. 214 European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-4 (2019) European Physical Journal The European physical journal / C 79(3), 214-214 (2019). doi:10.1140/epjc/s10052-019-6702-y