V. A. Babenko, N. M. Petrov, “Off-shell two-particle scattering amplitude in the $P$-matrix approach”, TMF, 75:1 (1988), 61–69; Theoret. and Math. Phys., 75:1 (1988), 371–377
N. M. Petrov, “Off-shell description of two-particle interactions by the boundary condition method”, TMF, 75:1 (1988), 53–60; Theoret. and Math. Phys., 75:1 (1988), 365–370
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