@article{AA_1992_4_5_a6,
     author = {K. A. Makarov},
     title = {Semiboundedness of the energy operator of a~system of three particles with paired interactions of $\delta$-function type},
     journal = {Algebra i analiz},
     pages = {155--171},
     publisher = {mathdoc},
     volume = {4},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1992_4_5_a6/}
}