Invitation to compositionKluge, Liivi; Paal, Eugen; Stasheff, JimCommunications in algebra2000 / 3, p. 1405-1422

On algebraic structure of pre-operadKluge, Liivi2002 https://www.ester.ee/record=b1688674*est

On derivation deviations in an abstract pre-operadKluge, Liivi; Paal, EugenCommunications in algebra2001 / p. 1609-1626

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

Sissejuhatus operaadarvutusseKluge, Liivi; Paal, EugenAastaraamat 1999 / Eesti Matemaatika Selts2001 / lk. 13-26

TetracompositionKluge, Liivi; Paal, EugenCommunications in contemporary mathematics2002 / 3, p. 435-456