Abanavaz F, Bafruei MK. Studying a Two-level Supply Chain Including a Manufacturer and Several Retailers with a Wholesale Price Contract between Them. IRMM [Internet]. 2020 Oct. 10 [cited 2024 Nov. 14];10(5):165-71. Available from: https://econjournals.com./index.php/irmm/article/view/8402