MobileLLM-R1: Exploring the Limits of Sub-Billion Language Model Reasoners with Open Training Recipes - Zhao, Changsheng; Chang, Ernie; Liu, Zechun; Chang, Chia-Jung; Wen, Wei; Lai, Chen; Cao, Sheng; Tian, Yuandong; Krishnamoorthi, Raghuraman; Shi, Yangyang; Chandra, Vikas (International Conference on Learning Representations, 2026)