Dzhumadildaev A.S. 2p-Commutator on differential operators of order p // Letters in Mathematical Physics. – 2014. – V. 104, No.7. – P. 849-869.
Dzhumadildaev A.S. 2p-Commutator on differential operators of order p // Letters in Mathematical Physics. — 2014. — V. 104, No.7. — P. 849—869.