Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Amitabha Mukerjee, Sanjay Sharma, Ram Bhushan Agrawal. When is an obstacle a perfect obstacle. IEEE Transactions on Robotics, 14(3):497-503, 1998. [doi]
Abstract is missing.