no. 4
The secretary problem : optimal selection with batch-interviewing and cost
RAIRO - Operations Research - Recherche Opérationnelle, Tome 26 (1992) no. 4, pp. 391-407 
@article{RO_1992__26_4_391_0,
     author = {Govindarajulu, Z.},
     title = {The secretary problem : optimal selection with batch-interviewing and cost},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {391--407},
     year = {1992},
     publisher = {EDP Sciences},
     volume = {26},
     number = {4},
     mrnumber = {1196906},
     zbl = {0783.62057},
     language = {en},
     url = {https://www.numdam.org/item/RO_1992__26_4_391_0/}
}
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Govindarajulu, Z. The secretary problem : optimal selection with batch-interviewing and cost. RAIRO - Operations Research - Recherche Opérationnelle, Tome 26 (1992) no. 4, pp. 391-407. https://www.numdam.org/item/RO_1992__26_4_391_0/

1. Y. S. Chow, S. Moriguti, H. Robbins and S. M. Samuels, Optimum Selection Based on Relative Rank (the "secretary problem"), Israel J. Math., 1964, 2, p. 81-90. | Zbl | MR

2. Z. Govindarajulu, The Secretary Problem: Optimal Selection with Interview Cost and Recall II. Unpublished manuscript, 1990. | Zbl | MR

3. T. J. Lorenzen, Optimal Stopping with Sampling Cost: the Secretary Problem, Ann. Prob., 1981, 9, p. 167-172. | Zbl | MR

4. H. Robbins, Remarks on the Secretary Problem. Robbins Volume of Amer, J. Math. and Mgt. Sci., 1991, 11, p. 25-37. | Zbl | MR