by Sergej Težak, Ratko Zelenika, Drago Sever
Published in Promet (01.07.2011)

by Ratko Zelenika, Tomaž Lotrič, Ervin Bužan
Published in Promet (01.01.2011)

by Zelenika, Ratko
Published in Naše more znanstveni časopis za more i pomorstvo (01.01.2016)

by Sabina Zebec, Ratko Zelenika, Slobodan Zečević
Published in Promet (01.03.2007)

by Ratko Zelenika, Darko Bečaj, Helga Pavlić Skender
Published in Promet (01.01.2008)

by Tanja Poletan Jugović, Alen Jugović, Ratko Zelenika
Published in Promet (01.01.2007)

by Drago Pupavac, Jasmin Pašagić Škrinjar, Ratko Zelenika
Published in Promet (01.01.2007)

by Ratko Zelenika, Drago Sever, Sabina Zebec, Bojan Pirš
Published in Promet (01.01.2005)

by Ratko Zelenika, Drago Pupavac
Published in Promet (01.01.2003)

by Drago Pupavac, Ratko Zelenika, Marinko Jurčević
Published in Promet (01.05.2004)

by Zelenika, Ratko
Published in Zbornik radova Ekonomskog fakulteta u Rijeci (01.07.2011)

by Zelenika, Ratko
Published in Naše more znanstveni časopis za more i pomorstvo (01.03.2016)

by Zelenika, Ratko
Published in Naše more znanstveni časopis za more i pomorstvo (01.01.2016)

by Ratko Zelenika, Katarina Toković
Published in Promet (01.10.2012)

by Ratko Zelenika
Published in Zbornik radova Ekonomskog fakulteta u Rijeci (01.05.2007)

by Zelenika, Ratko
Published in Zbornik radova Ekonomskog fakulteta u Rijeci (19.12.2008)

by Zelenika, Ratko, Viducic, Vinko
Published in Ekonomski pregled (01.10.2007)

by Zelenika, Ratko, Lotric, Tomaz
Published in Naše more znanstveni časopis za more i pomorstvo (01.01.2008)

by Zelenika, Ratko, Mrvcic mag ek, Ana, Skender, Helga Pavlic
Published in Naše more znanstveni časopis za more i pomorstvo (01.01.2011)

by Drago Pupavac, Ratko Zelenika
Published in Zbornik radova Ekonomskog fakulteta u Rijeci (01.08.2005)