Apostolov, A.A., Fakirov, S., Sezen, B., Bahar, İ., Kloczkowski, A., “Structural and Mechanical Studies of a Blend of Poly (butylene terephthalate) and Poly (ether ester) Based on Poly (butylene terephthalate) and Poly (ethylene glycol)”, Polymer, 35, 24, 5247-5255, 1994.