Solomatin D. V. «Researches of semigroups with planar Cayley graphs: results and problems» // Applied Discrete Mathematics 2021. №54 C.5-57
Knyazev Oleg V., Solomatin Denis V. «Multiplicative residue semigroups with planar Cayley graphs» // Prikladnaya Diskretnaya Matematika - Applied Discrete Mathematics 2024. №66 C.36-44
Solomatin D. V. «The ranks of planarity for varieties of commutative semigroups» // Applied Discrete Mathematics 2016. №4(34) C.50-64