Castilho Alcarás, J. A.2022-04-292022-04-291977-01-01Journal of Mathematical Physics, v. 19, n. 8, p. 1714-1719, 1977.0022-2488http://hdl.handle.net/11449/231077Exact formulas for the calculation of two-body central interactions in the K-harmonics method are derived. These formulas hold for any approximations and account for diagonal and off-diagonal matrix elements as well. © 1978 American Institute of Physics.1714-1719engArtigo10.1063/1.5238702-s2.0-36749114178