Fried Ervin: Varieties of weak lattices covering the variety of distributive lattices. In: Acta scientiarum mathematicarum, (75) 3-4. pp. 377-392. (2009)
Fried Ervin: Dual discriminator for graph algebras and weak lattices. In: Acta scientiarum mathematicarum, (72) 3-4. pp. 459-479. (2006)
Fried Ervin: Relations among lattice-properties. In: Acta scientiarum mathematicarum, (72) 3-4. pp. 507-523. (2006)
Fried Ervin: Dual discriminator function for graph algebras. In: Acta scientiarum mathematicarum, (67) 3-4. pp. 475-492. (2001)
Fried Ervin: Dual discriminator, revisited. In: Acta scientiarum mathematicarum, (64) 3-4. pp. 437-453. (1998)
Fried Ervin; Sichler Jiří: On endomorphisms and automorphisms of monounary algebras. In: Acta scientiarum mathematicarum, (64) 1-2. pp. 13-36. (1998)
Szederkényi Antal; Fried Ervin: Fried Ervin: Lineáris algebra. In: Módszertani közlemények, (26) 4. pp. 256-257. (1986)
Fried Ervin: Representation of partially ordered groups : To Professor L. Kalmár on his 60th birthday. In: Acta scientiarum mathematicarum, (26) 1-2. pp. 15-18. (1965)
Fried Ervin: Über als echte Quotientenkörper darstellbare Körper. In: Acta scientiarum mathematicarum, (15). pp. 143-144. (1954)