Geodesic
On the image in $H^2(Q^3;R)$ of the set of closed 2-forms with preassigned kernel
Zapiski Nauchnykh Seminarov POMI, Differential geometry, Lie groups and mechanics. Part 15–1, Tome 234 (1996), pp. 125-136

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If $(P^{2n},\omega)$ is a symplectic manifold and $Q^3$ is its orientable closed submanifold such that $\omega/Q\ne0$, then there arises a one-dimensional distribution $\mathcal L=\operatorname{Ker}(\omega/Q)$. We study the dependence of $\omega$ in a neighborhood of $Q^3$ and of $[\omega]\in H^2(Q;R)$ on $\mathcal L$. Bibl. 13 titles. 
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     author = {B. S. Kruglikov},
     title = {On the image in $H^2(Q^3;R)$ of the set of closed 2-forms with preassigned kernel},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--136},
     publisher = {mathdoc},
     volume = {234},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1996_234_a8/}
}
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B. S. Kruglikov. On the image in $H^2(Q^3;R)$ of the set of closed 2-forms with preassigned kernel. Zapiski Nauchnykh Seminarov POMI, Differential geometry, Lie groups and mechanics. Part 15–1, Tome 234 (1996), pp. 125-136. http://geodesic.mathdoc.fr/item/ZNSL_1996_234_a8/