Hikima, Y., Y. Akagi, H. Kim, and T. Asami. “An Improved Approximation Algorithm for Wage Determination and Online Task Allocation in Crowd-Sourcing”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 37, no. 4, June 2023, pp. 3977-86, doi:10.1609/aaai.v37i4.25512.