A CLASS OF SOLUTIONS OF THE STEADY-STATE VACUUM EINSTEIN EQUATIONS Статья BEISEKEEV S.B., GUTSUNAEV T.I. JETP Letters. Том 54. 1991. С. 599-602
NEW EXACT SOLUTION OF EINSTEIN EQUATIONS FOR THE GRAVITATIONAL-FIELD OF A STATIONARY AXISYMMETRICAL MASS Статья MANKO V.S., KHAKIMOV S.A. JETP Letters. Том 51. 1990. С. 557-560