people detection and tracking and state of art

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By people if you mean pedestrian, I found these links:

• Ten Years of Pedestrian Detection, What Have We Learned?
• Pedestrian Detection: An Evaluation of the State of the Art

For tracking:

• Object Tracking: A Survey
• The State of the Art in Multiple Object Tracking Under Occlusion in Video Sequences

There should have plenty of papers on Google Scholar or on publication sites.

The paper The State of the Art in Multiple Object Tracking is too old (2003).

For tracking, you have also:

• VOT (Visual Object Tracking) challenges
• OpenCV also have vision challenge in tracking
• Online Object Tracking: A Benchmark and Visual Tracker Benchmark and Visual Tracker Benchmark.
• Multiple Object Tracking Benchmark

By looking to the reference parts for each recent and serious paper, you should have a correct overview on the subject.