R. Fujishiro, H. Sonoyama, Y. Ide, T. Fujimura, R. Sasai,N. E. M. Kaufman,
Z. Zhou, M. G. H. Vicente, and T. Ikeue, Singlet oxygen generation of subphthalocyanine-fused
dimer and trimer, J. Porphyrins Phthalocyanines, 23(2019) in press.
DOI: 10.1142/S1088424619500895.