• A standard wreath product of groups and its endomorphism semigroupPuusemp, PeeterAlgebras, groups and geometries2003 / 2, p. 101-115
• A characterization of divisible and torsion abelian groups by their endomorphism semigroupsPuusemp, PeeterAlgebras, groups and geometries1999 / p. 183-193
• 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
• Endomorphism semigroups of Schmidt groupsPuusemp, PeeterAlgebras, groups and geometries2001 / p. 139-152
• Local differentiable loops and BRST-like cohomologyKuusk, Piret; Paal, EugenAlgebras, groups and geometries1996 / p. 465-469
• On endomorphism semigroups of dihedral 2-groups and alternating group A4Puusemp, PeeterAlgebras, groups and geometries2000 / p. 487-500
• On the definability of a semidirect product of cyclic groups by its endomorphism semigroupPuusemp, PeeterAlgebras, groups and geometries2002 / p. 195-212
• On the torsion subgroups and endomorphism semigroups of abelian groupsPuusemp, PeeterAlgebras, groups and geometries1997 / p. 407-422
• Operads and cohomologyKluge, Liivi; Paal, EugenAlgebras, groups and geometries2004 / p. 1-7
• Operads and deformationsPaal, EugenAlgebras, groups and geometries2005 / p. 193-200
• A semidirect product of cyclic groups and its endomorphism semigroupPuusemp, PeeterAlgebras, groups and geometries2004 / p. 137-152
• Supermultiplets and relativistic problems : Bhabha equations in Hamiltonian formLoide, Rein-Karl; Ots, Ilmar; Saar, ReinAlgebras, groups and geometries2001 / 4, p. 445-460