Perivoj Hrvatskih velikana - Lavoslav Leopold Ružička (in Croatian), in text is explained origin of names Lavoslav (Leopold)

Znanost u Hrvata - Lavoslav Ružička - Science in Croatia

Lavoslav Ružička - homepage of Croatia, croatian Nobel laureats

Lavoslav Ružička - Wikipedija (in Croatian)

Encyclopedia Britanica - the article from the famous encyclopedia

Nobel e-Museum - Lavoslav Ružička

Wikipedia - Lavoslav Ružička

ETH Bibliothek - Leopold Ružička

Velučilište Lavoslav Ružička, Vukovar - Polytehnic shool in Vukovar named after Ruzicka

Primary school Sveta Ana, Osijek - Lavoslav Ružička