no. 1
On the existence of gravitational fields which are stationary initially and finally
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 11 (1969) no. 1, pp. 57-80. 
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     author = {Papapetrou, A.},
     title = {On the existence of gravitational fields which are stationary initially and finally},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {57--80},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {1},
     year = {1969},
     mrnumber = {253712},
     zbl = {0181.57301},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1969__11_1_57_0/}
}
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Papapetrou, A. On the existence of gravitational fields which are stationary initially and finally. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 11 (1969) no. 1, pp. 57-80. http://www.numdam.org/item/AIHPA_1969__11_1_57_0/

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