F. Majeed and  D. V. Thiel and  M. Shahpari,  An Electrically Small Silver Ink Printed FR4 Antenna for RF Transceiver Chip CC1101.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 121(1). 66 - 69
    [viewed 05 March 2021]. Available from: https://publications.waset.org/pdf/10006272.