- Feng Qi, Wen-Hui Li, “A LOGARITHMICALLY COMPLETELY MONOTONIC FUNCTION INVOLVING THE RATIO OF GAMMA FUNCTIONS”, jaac, 5, no. 4, 2015,
626 
- Bai-Ni Guo, Feng Qi, “Some identities and an explicit formula for Bernoulli and Stirling numbers”, Journal of Computational and Applied Mathematics, 255, 2014,
568