Penentuan konstanta stabilitas (pembentukan) subtitusi 4,4-bipiridin terhadap senyawa M(bipy)2(H2O)22+ dan M(phen)2(H2Q)22+ [ M = Fe2+, co2+, Ni2+; bipy = 2,2-bipiridin dan phen = 2,9-dimetil-1,10-fenantrolin] - Sal Prima Yudha S., author (Universitas Indonesia, 2001)