@article {sakamoto1999counterrotating, title = {Counterrotating nuclear disks in Arp 220}, journal = {The Astrophysical Journal}, volume = {514}, year = {1999}, pages = {68}, publisher = {IOP Publishing}, author = {Sakamoto, K and Scoville, NZ and Yun, Min S and Crosas, M and Genzel, R and Tacconi, LJ} }