Update our citation list

By creating this pull request, I confirm that I have read and fully accept and agree with one of the Petrobras' Contributor License Agreements (CLAs):

ICLA: Individual Contributor License Agreement on behalf of only yourself;
CCLA: Corporate Contributor License Agreement on behalf of your employer.

Our CLAs are based on the Apache Software Foundation's CLAs:

ICLA: Individual Contributor License Agreement
CCLA: Corporate Contributor License Agreement

petrobras / 3W

Update our citation list #33