Geodesic
On some operations in the lattice of submodules determined by preradicals
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2011), pp. 5-16.

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In the lattice L(RM) of all submodules of a module RM four operations are defined using the standard preradicals: α-product, ω-product, α-coproduct and ω-coproduct. Some properties of these operations, as well as some connections with the lattice operations of L(RM) are indicated. For characteristic submodules these operations were studied in the work [5]. 
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A. I. Kashu. On some operations in the lattice of submodules determined by preradicals. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2011), pp. 5-16. https://geodesic-test.mathdoc.fr/item/BASM_2011_2_a0/

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[4] Raggi F., Rios J., Rincon H., Fernandes-Alonso R., Signoret C., “Prime and irreducible preradicals”, J. of Algebra and its Applications, 4:4 (2005), 451–466 | DOI | MR | Zbl

[5] Kashu A. I., “Preradicals and characteristic submodules: connections and operations”, Algebra and Discrete Mathematics, 9:2 (2010), 61–77 | MR | Zbl

[6] Raggi F., Montes J. R., Wisbauer R., “Coprime preradicals and modules”, J. of Pure and Applied Algebra, 200 (2005), 51–69 | DOI | MR | Zbl