Pure Appl. Chem., 1986, Vol. 58, No. 1, pp. 89-94
http://dx.doi.org/10.1351/pac198658010089
Cyclobutadiene radical cations and 2-azapyrylium ions
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Pure Appl. Chem., 1986, Vol. 58, No. 1, pp. 89-94
http://dx.doi.org/10.1351/pac198658010089