@article {MR2079762, AUTHOR = {Krasnosel{\cprime}skii, A. M. and Rachinskii, D. I.}, TITLE = {<br/> Remark on the {H}opf bifurcation theorem}, JOURNAL = {Math. Nachr.}, FJOURNAL = {Mathematische Nachrichten}, VOLUME = {272}, YEAR = {2004}, PAGES = {95--103}, ISSN = {0025-584X}, MRCLASS = {34C23 (37G10)}, MRNUMBER = {2079762 (2005g:34088)}, MRREVIEWER = {Henry W. Haslach, Jr.}, DOI = {10.1002/mana.200310190}, bibbase_note = {<a href="http://dx.doi.org/10.1002/mana.200310190" target="_blank"> <span style="color: green">Journal link</span></A>.}, }