In November 2012 Locus Online hosted a set of polls for the best science fiction and fantasy novels and short fiction of the 20th and 21st (so far) centuries, with five categories in each century: SF novel, fantasy novel, novella, novelette, and short story. For 20th century categories, up to 10 votes in each category were allowed; for 21st century categories, 5 items in each were allowed. Results depend on rank of votes within each category, using algorithms that reward a 1st place vote twice as many points as a 5th or 10th place vote, but not 5 times or 10 times as many.
A total of 625 valid ballots were received, three-quarters of them in the last four days of November. Results for novels were posted on 21 December, below (http://www.locusmag.com/2012/AllCenturyPollsResults.html#novels).
Here are results of Locus Online's 20th and 21st centuries polls in short fiction categories -- novella, novelette, and short story. Complete results are posted on the following pages; the first of these includes details about how the votes were compiled.
Kraca forma: http://www.locusmag.com/2012/CompleteResultsShf.html (http://www.locusmag.com/2012/CompleteResultsShf.html)
Sve zajedno (za roman dosta skrolovati) http://www.locusmag.com/2012/AllCenturyPollsResults.html (http://www.locusmag.com/2012/AllCenturyPollsResults.html)