Geodesic
Distributions of $m$-dimensional line elements in a~space with projective connection.~II
Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 3 (1971), pp. 95-114.

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This paper is a continuation of the paper by G. F. Laptev and N. M. Ostianu [2]. The study of distribution is continued, but the attention is paid mainly to constructions depending only on so called fundamental subobject of the distribution. In § 1 is proved that the sequence of fundamental objects admits a sequence of subobjects (fundamental subobjects). In § 2–4 objects are constructed which determine fields of invariant planes intrinsically related to the distribution and defined by the fundamental subobjects. In § 5 systems of hyperquadrics defined by the fundamental subobjects of the distribution are considered. In § 6 the similarity between the geometry of surfaces and geometry of distributions is indicated. 
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     author = {N. M. Ostianu},
     title = {Distributions of $m$-dimensional line elements in a~space with projective {connection.~II}},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {95--114},
     publisher = {mathdoc},
     volume = {3},
     year = {1971},
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     url = {http://geodesic.mathdoc.fr/item/INTG_1971_3_a3/}
}
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N. M. Ostianu. Distributions of $m$-dimensional line elements in a~space with projective connection.~II. Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 3 (1971), pp. 95-114. http://geodesic.mathdoc.fr/item/INTG_1971_3_a3/