1. Graduate Texts in Mathematics;P Abramenko,2008
2. Birkhoff, G.: Lattice Theory, American Mathematical Society Colloquium Publications, vol. 25, 3rd edn. American Mathematical Society, Providence, RI, (1979)
3. Björner, A.: On complements in lattices of finite length. Discrete Math. 36(3), 325–326 (1981)
4. Flores, A.: Über $$n$$ n -dimensionale Komplexe die im $${R}_{2n+1}$$ R 2 n + 1 absolut selbstverschlungen sind. Ergeb. Math. Kolloq. 4, 6–7 (1932/1934)
5. Cambridge Studies in Advanced Mathematics;JE Humphreys,1990