Compare and contrast (similarities or differences or both) three (or more) research articles. What are the issues the authors have addressed in these articles and what they have found or argued?

Issues

Article 1 - One such topic of increasing interest is the green, environmental supply chain management issues. This area involves and screens suppliers based on their organizational environmental performance, and distinguishes whether a certain supplier's performance is the baseline (e.g. meeting regulatory requirements) or advanced (e.g. collaborative green product design) practice (Rao, 2002).

Article 2 - This paper provides a decision framework to support SSS & OA for multiple periods in a multi-supplier, multi-item situation where There are uncertainties in the availability of the suppliers in each period, Each supplier has its own pricing policy including discounts, Lost sales are allowed, The demand in each period is stochastic, One supplier can produce/deliver more than 1 item.