no. 2
Some use of some “symmetries” of some random process
Annales de l'institut Henri Poincaré. Section B. Calcul des probabilités et statistiques, Tome 12 (1976) no. 2, pp. 193-197 
@article{AIHPB_1976__12_2_193_0,
     author = {Adelman, Omer},
     title = {Some use of some {\textquotedblleft}symmetries{\textquotedblright} of some random process},
     journal = {Annales de l'institut Henri Poincar\'e. Section B. Calcul des probabilit\'es et statistiques},
     pages = {193--197},
     year = {1976},
     publisher = {Gauthier-Villars},
     volume = {12},
     number = {2},
     mrnumber = {426217},
     zbl = {0346.60040},
     language = {en},
     url = {https://www.numdam.org/item/AIHPB_1976__12_2_193_0/}
}
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Adelman, Omer. Some use of some “symmetries” of some random process. Annales de l'institut Henri Poincaré. Section B. Calcul des probabilités et statistiques, Tome 12 (1976) no. 2, pp. 193-197. https://www.numdam.org/item/AIHPB_1976__12_2_193_0/

[1] Paul Erdös and Peter Ney, Some problems on random intervals and annihilating of particles. Ann. of Prob., vol. 2, n° 5, 1974, p. 828. | Zbl | MR