Pekka Salonen Lauri Sydänheimo Mikko Keskilammi Markku Kivikoski A Small Planar Inverted-F Antenna for Wearable Applications. 95-100 1999 ISWC http://computer.org/proceedings/iswc/0428/04280095abs.htm db/conf/iswc/iswc1999.html#SalonenSKK99