Coalgebra, cocomposition and cohomologyOziewicz, Zbigniew; Paal, Eugen; Rozanski, JerzyNon-associative algebra and its applications1994 / p. 314-322

Coassociativity, cohomology and Gerstenhaber algebrasPaal, EugenAlgebras, groups and geometries1998 / p. 85-93

Coassociativity, cohomology and quantum determinantOziewicz, Zbigniew; Paal, Eugen; Rozanski, JerzyAlgebras, groups and geometries1995 / p. 99-109 https://www.researchgate.net/publication/269024862_Coassociativity_cohomology_and_quantum_determinant https://www.ester.ee/record=b3376117*est

Geodesic loops and BRST-like cohomologyKuusk, Piret; Paal, EugenProceedings of the Estonian Academy of Sciences. Physics. Mathematics1996 / 2/3, p. 128-133

Local differentiable loops and BRST-like cohomologyKuusk, Piret; Paal, EugenAlgebras, groups and geometries1996 / p. 465-469

Operads and cohomologyKluge, Liivi; Paal, EugenAlgebras, groups and geometries2004 / p. 1-7

Operads and nonassociative deformationsPaal, EugenNon-associative algebra and its applications2006 / p. 323-328 https://www.taylorfrancis.com/chapters/edit/10.1201/9781420003451-34/operads-nonassociative-deformations-eugen-paal

Operads for x-physicsPaal, EugenAbstracts of 10th International Colloquium "Quantum Groups and Integrable Systems" : Prague, 21-23 June, 20012001 / p. 8 https://www.researchgate.net/publication/226036969_Operads_for_x-physics

Operads for x-physicsPaal, EugenCzechoslovak journal of physics2001 / 12, p. 1407-1413

Operads, cohomology, and deformationsPaal, EugenNew Developments in Mathematical Physics Research2004 / p. 117-129