Article about deep meditation state

[ORsEnTURVi]

Hi,

I am looking for the following articles that hint about medical proof for deep meditation state:

https://www.researchgate.net/publication/18376074_Studies_on_a_yogi_during_an_eight-day_confinement_in_a_sealed_underground_pit

https://www.researchgate.net/publication/282025304_Studies_on_Shri_Ramanand_Yogi_during_his_stay_in_an_air-tight_box_1961

Please provide pdf file for solution. Thank you very much.