Text.01 - https://cs.wikipedia.org/wiki/Lev#Historick.C3.BD_v.C3.BDvoj
Text.02 - https://cs.wikipedia.org/wiki/Lev#Potrava_a_lov
Text.03 - https://cs.wikipedia.org/wiki/Lev#Rozmno.C5.BEov.C3.A1n.C3.AD_a_sexualita
Text.04 - https://cs.wikipedia.org/wiki/Lev#Populace_a_roz.C5.A1.C3.AD.C5.99en.C3.
Text.05 - https://cs.wikipedia.org/wiki/Lev#Sou.C4.8Dasn.C3.BD_v.C3.BDskyt