rikkisidosten

Could you clarify what you mean by "rikkisidosten"? It does not appear to correspond to a widely known term in Estonian or other languages, and I want to ensure I write an accurate wiki-style article. If you can provide the language, context, or a brief description of the topic (for example whether it refers to a place, a concept, a historical term, or something else), I’ll draft a concise, neutral article under 300 words. If you have a source or spelling variant, sharing that would also help.