TY  - JOUR
AU  - Tzenov, Stephan I.
TI  - The method of formal series: applications to nonlinear beam dynamics and invariants of motion 
JO  - Journal of nonlinear sciences and its applications
PY  - 2025
SP  - 1
EP  - 19
VL  - 18
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.22436/jnsa.018.01.01/
DO  - 10.22436/jnsa.018.01.01
LA  - en
ID  - JNSA_2025_18_1_a0
ER  -