Geodesic
Some questions on the geometry of nonholonomic hypercomplexes $\mathrm{NGr}(1,4,5)$
Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 5 (1974), pp. 55-68 
S. I. Grigelionis. Some questions on the geometry of nonholonomic hypercomplexes $\mathrm{NGr}(1,4,5)$. Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 5 (1974), pp. 55-68. http://geodesic.mathdoc.fr/item/INTG_1974_5_a1/
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     author = {S. I. Grigelionis},
     title = {Some questions on the geometry of nonholonomic hypercomplexes $\mathrm{NGr}(1,4,5)$},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {55--68},
     year = {1974},
     volume = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1974_5_a1/}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

This paper is a continuation of the paper by V. J. Bliznikas and the author [1]. In § 1 of this paper the definition of a nonlrolonomic hppecomplex $\mathrm{NGr}(1,4,5)$ is given and the structure of the first fundamental object $H^1(\mathrm{NGr}(1,4,5))$ is considered. In § 2 an another non-holonomic hypercomplex, a semi-non-holonomic pseudocongruence and a semi-non-holonomic congruence asstciated to the given non-holonomic hypercomplex are obtained. In § 3 it is proved that $H^1(\mathrm{NGr}(1,4,5))$ is the principal object (see G. F. Laptev [11]) of $\mathrm{NGr}(1,4,5)$.