Hernández's works' include "Ahora seremos felices" (Now We Will Be Happy), "Campanitas de cristal" (Crystal Bells), "Capullito de Alhelí", "Culpable" (Guilty),"El Cumbanchero" (also known as "Rockfort Rock" or ""Comanchero" (sic)" to reggae aficionados), "Ese soy yo" (That's Me), "Perfume de Gardenias" (Gardenia's Perfume), "Silencio" (Silence), and "Tú no comprendes" (You Don't Understand), among 3,000 others.
Композитор является автором около 3000 песен, в том числе таких популярных, как «Ahora seremos felices» (Now We Will Be Happy), «Campanitas de cristal» (Crystal Bells), «Capullito de Alhelí», «Culpable» (Guilty), «El Cumbanchero», «Rockfort Rock», «Comanchero», «Ese soy yo» (That’s Me), «Perfume de Gardenias» (Gardenia Perfume), «Silencio» (Silence), и «Tú no comprendes» (You Don’t Understand).