Photochromic spiro[indoline-pyridobenzopyrans]: fluorescent metal ion sensors - Voloshin, Nikolai A.; Chernyshev, Anatoly V.; Metelitsa, Anatoly V.; Besugliy, Serguei O.; Voloshina, Elena N.; Sadimenko, Lidiya P.; Minkin, Vladimir I. (ARKIVOC, 2004)
doi: 10.3998/ark.5550190.0005.b03