\input zb-basic
\input zb-ioport
\iteman{io-port 50221580}
\itemau{Gupta, Bhupendra}
\itemti{Critical sensing radius to cover the surface of a unit sphere by $N$ sensors}
\itemso{Ad Hoc & Sensor Wireless Networks 11, No. 3-4, 165-172 (2011).}
\itemcc{}
\itemut{}
\itemli{http://www.oldcitypublishing.com/AHSWN/AHSWNabstracts/AHSWN11.3-4abstracts/AHSWNv11n3-4p165-172Gupta.html}
\end