Since issue 32 of Cotinga some of the articles in the printed version have been published in Cotinga Online ahead of the publication of the printed version. Cotinga Online is essentially a separate publication, though almost all of the papers in it (except for two in Cotinga Online 32) have been published in the printed version of Cotinga as well. If you are citing any of the papers that appeared in both journals, the NBC would prefer you to cite the details of the paper as it appeared in Cotinga – full details of which are given here: Cotinga Index .
The contents of each issue of Cotinga Online is given below, along with links to .pdfs of those paper.