I wouldn't go seeking out random articles on which to understand or judge your therapeutic relationship. If you thought you understood after speaking to your therapist, and your anxious searching to understand further has backfired, I'd suggest you return to your therapist.

You really can't believe everything you read, especially don't believe it's all relevant to you. I can find many articles saying the exact opposite, and articles taking every position in between, a hundred articles with a hundred variations. Further, different types of therapy and different individuals all define boundaries differently. It is in the relationship, by speaking with the person, that you'll be clear on the boundaries for your unique therapeutic relationship.