@article{article, title = {{Evidence for exclusive ηc production in γγ interactions}}, publisher = {{Elsevier BV}}, url = {{}}, year = {{1986}}, month = {{1}}, author = {{Berger C and Genzel H and Lackas W and Pielorz J and Raupach F and Wagner W and Klovning A and Lillestöl E and Bürger J and Criegee L and Deuter A et al}}, doi = {{10.1016/0370-2693(86)90558-7}}, volume = {{167}}, journal = {{Physics Letters B}}, issue = {{1}}, pages = {{120-126}}, note = {{Accessed on 2024/12/23}}}