@article{DAN_1974_218_5_a18,
     author = {V. M. Nikolaenko},
     title = {On scale-invariant equations of gravitational field in the theory with quadratic {Lagrangians}},
     journal = {Doklady Akademii Nauk},
     pages = {1068--1070},
     publisher = {mathdoc},
     volume = {218},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_218_5_a18/}
}