Geodesic
The minimal and characteristic polyanalytic polynomials of a~normal matrix
Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXX, Tome 463 (2017), pp. 154-159

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The concept of the minimal polyanalytic polynomial was introduced by M. Huhtanen in connection with the generalized Lanczos process as applied to a normal matrix. The paper discusses the possibility of finding an equivalent of the characteristic polynomial in the set of polyanalytic polynomials. 
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     author = {Kh. D. Ikramov},
     title = {The minimal and characteristic polyanalytic polynomials of a~normal matrix},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {154--159},
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     volume = {463},
     year = {2017},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_2017_463_a11/}
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Kh. D. Ikramov. The minimal and characteristic polyanalytic polynomials of a~normal matrix. Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXX, Tome 463 (2017), pp. 154-159. http://geodesic.mathdoc.fr/item/ZNSL_2017_463_a11/