On radical classes of Abelian linearly ordered groups Ján Jakubík (1985) Mathematica Slovaca Similarity:
Hereditary radical classes of linearly ordered groups Mária Jakubíková (1983) Časopis pro pěstování matematiky Similarity:
Covering condition in the lattice of radical classes of linearly ordered groups Gabriela Pringerová (1983) Mathematica Slovaca Similarity: