List of Articles Business Models Open Access Article Abstract Page Full-Text 1 - Identify appropriate methods to block the flow of income businesses (Case Study: Firm ideal wallpaper (wallpaper industry)) Sedigheh Bahrami Komeyl ali abdollahi 10.7508/jstpi.2017.01.006 Open Access Article Abstract Page Full-Text 2 - Presenting a circular economy business model for knowledge-based companies Fatemeh Shahdkar taghi torabi Fereydoon Rahnama Roodposhti 10.61186/jstpi.37987.19.75.33