MALDI mass spectrometry of zirconium and hafnium dibenzoylmethanate phthalocyanines - Ya. Chernii; O. V. Severinovskaya; V. B. Kovalska; I. N. Tretyakova; Yu. Losytskyy; S. M. Yamoluk; S. V. Volkov (Ukrainian Chemistry Journal, 2012)