IEEE citation order check

Source order

Another source is the Parliament paper [1].

One source is the MapReduce paper [2].

The MapReduce paper is cited again [2].

References

[1]
L. Lamport, “The part-time parliament,” ACM Transactions on Computer Systems, vol. 16, no. 2, pp. 133–169, May 1998, doi: 10.1145/279227.279229.
[2]
J. Dean and S. Ghemawat, “MapReduce,” Communications of the ACM, vol. 51, no. 1, pp. 107–113, Jan. 2008, doi: 10.1145/1327452.1327492.