Maekawa, M. (1985). A sqrt(N) algorithm for mutual exclusion in decentralized systems. ACM Transactions on Computer Systems (TOCS), 3(2), 145-159.

Ricart, G., & Agrawala, A. K. (1981). An optimal algorithm for mutual exclusion in computer networks. Communications of the ACM, 24(1), 9-17.

Lamport, L. (1978). Time, clocks, and the ordering of events in a distributed system. Communications of the ACM, 21(7), 558-565.