[1]
V. I. Khrabustovsky, «On the Characteristic Operators and Projections and on the Solutions of Weyl Type of Dissipative and Accumulative Operator Systems. III. Separated Boundary Conditions», Журн. мат. фіз. анал. геом., вип. 2, вип. 4, с. 449–473, Трав 2006.