1. Laboratoire de Physique Théorique et Modélisation, UMR 8089, CY Cergy Paris Université, CNRS, 95302 Cergy-Pontoise, France
2. Institute of Continuous Media Mechanics, Ural Branch of RAS, Acad. Korolev street 1, 614013 Perm, Russia
3. Department of Theoretical Physics, Perm State University, Bukirev street 15, 614099 Perm, Russia
4. Institute for Pure and Applied Mathematics and Department of Physics (SUPA), Old Aberdeen, Aberdeen AB24 3UE, United Kingdom
5. CNR—Consiglio Nazionale delle Ricerche—Istituto dei Sistemi Complessi, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
6. INFN Sezione di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Florence, Italy