@article{VTAMU_2020_25_130_a6,
     author = {G. F. Helminck and E. A. Panasenko},
     title = {Properties of the algebra psd related to integrable hierarchies},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {183--195},
     publisher = {mathdoc},
     volume = {25},
     number = {130},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2020_25_130_a6/}
}