System T
Please expand.
References
@article{godel_1958,
title = {\"{U}ber eine bisher noch nicht ben\"{u}tzte {Erweiterung} des finiten {Standpunktes}},
volume = {12},
doi = {10.1111/j.1746-8361.1958.tb01464.x},
number = {3-4},
journal = {Dialectica},
author = {G\"{o}del, Kurt},
year = {1958},
pages = {280--287},
}