THE ESSENTIAL SPECTRUM OF THE SCHRÖDINGER OPERATOR FOR A THREE-PARTICLE SYSTEM WITH MASSES m1 = M2 = c∞ AND m3 < ∞. Innovations in Science and Technologies, [S. l.], v. 2, n. 6, p. 678–687, 2025. Disponível em: https://www.innoist.uz/index.php/ist/article/view/1052. Acesso em: 17 jun. 2025.