TY - RPRT TI - Counterion effects on propylene polymerization using two-state ansa-metallocene complexes. AU - Muqtar Mohammed AU - Marcio Nele AU - Abdulaziz Al-Humydi AU - Shixuan Xin AU - Russell A Stapleton AU - Scott Collins PY - 2003 DO - 10.1021/ja0207706 UR - https://pubmed.ncbi.nlm.nih.gov/12823014/ ID - 12823014 ER -