TY  - JOUR
AU  - E. V. Musafirov
TI  - Admissible perturbations of Langford system
JO  - Problemy fiziki, matematiki i tehniki
PY  - 2016
SP  - 47
EP  - 51
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PFMT_2016_3_a6/
LA  - ru
ID  - PFMT_2016_3_a6
ER  -