Here’s a short (description/summary) for Plava zbirka – 2. dio (PDF) that you can use for a website, blog, or file-sharing page: Title: Plava zbirka – 2. dio (Matematički zadaci za gimnazije i tehničke škole) – PDF
Plava zbirka – 2. dio is the second part of the well-known Croatian mathematics problem collection, officially titled Zbirka zadataka iz matematike za gimnazije i tehničke škole . This volume typically covers advanced topics suitable for 3rd and 4th grade high school students (17–18 years old). plava zbirka 2 dio pdf