Balcells, Marc; Stanford, S. A. (October 1990). "A counterrotating core in the merger remnant candidate NGC 3656 (ARP 155)". The Astrophysical Journal. 362: 443. Bibcode:1990ApJ...362..443B. doi:10.1086/169281.
Balcells, Marc; Stanford, S. A. (October 1990). "A counterrotating core in the merger remnant candidate NGC 3656 (ARP 155)". The Astrophysical Journal. 362: 443. Bibcode:1990ApJ...362..443B. doi:10.1086/169281.