Kaligrafija
Poznati Zagrepčani: Izumitelj Slavoljub Eduard Penkala (1871. - 1922.)
Penkala patentirao prvu mehaničku olovku - Dubrovački dnevnik
Penkala - we have it every day in our hand to write - Go to Croatia
Set za kaligrafijo, 3 - svetidej.si
Penkala – Galerija Link
Slavoljub Eduard Penkala: The Reason We Write - Expat In Croatia
Slavoljub Eduard Penkala: The Reason We Write - Expat In Croatia
Raziskovalna naloga
Penkala - we have it every day in our hand to write - Go to Croatia
Vivapen Bombice s črnilom 12 kosov črne barve
Penkala – Galerija Link
Penkala - we have it every day in our hand to write - Go to Croatia
Zanimljivosti - Slavoljub Penkala
Kaligrafija
About Eduard Slavoljub Penkala
Penkala (documentary), Official intro HD - YouTube
Raziskovalna naloga
Penkala patentirao prvu mehaničku olovku na svijetu (1906.) | Povijest.hr
Eduard Slavoljub Penkala – Wikipedija
Slavoljub Penkala – Wikipedia
Vivapen Bombice s črnilom 12 kosov črne barve
