@article{Medrala-Sowa:2025x2, author = "Medrala-Sowa, J. and Perez del Rio, Elena and Moskal, Paweł", title = "{Mirror Matter in Positronium Decay Searches with the J-PET Detector}", doi = "10.22323/1.480.0088", journal = "PoS", year = 2025, volume = "EXA-LEAP2024", pages = "088" }