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Representations of algebraic groups of type $D_n$ in characteristic 2 with small weight multiplicities
Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 18, Tome 365 (2009), pp. 182-195 Cet article a éte moissonné depuis la source Math-Net.Ru

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Lower estimates for the maximal weight multiplicities in irreducible representations of the algebraic groups of type $D_n$ in characteristic 2 are found. If $n\geq8$, then either such multiplicity is at least $n-4-[n]_4$, where $[n]_4$ is the residue of $n$ modulo 4, or all weight multiplicities are equal to 1. For groups of types $B_n$ and $D_n$ in odd characteristic and of type $C_n$ in characteristic $>7$ similar results were obtained earlier. Bibl. – 11 titles. 
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A. A. Osinovskaya; I. D. Suprunenko. Representations of algebraic groups of type $D_n$ in characteristic 2 with small weight multiplicities. Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 18, Tome 365 (2009), pp. 182-195. http://geodesic.mathdoc.fr/item/ZNSL_2009_365_a9/

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