Pencils of Stäckel-type Novikov algebras yield centrally extended Dubrovin-Novikov operators that generate coupled and triangular cKdV and cHD soliton hierarchies.
and Sergyeyev A.,Natural coordinates for a class of Benenti systems, Phys
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From pencils of Novikov algebras of St\"ackel type to soliton hierarchies
Pencils of Stäckel-type Novikov algebras yield centrally extended Dubrovin-Novikov operators that generate coupled and triangular cKdV and cHD soliton hierarchies.