Optical diagnosis of melting bridges in the MarPCM microgravity experiment - P. Salgado Sánchez, C. Haukws, D. Gligor, J. M. Ezquerro, Ú. Martínez, J. Porter, Á. Bello, J. Rodríguez (28th Elgra Biennial Symposium And General Assembly, 2024)