Nagendra Bhargava Bharatula Paul Lukowicz Gerhard Tröster Functionality-power-packaging considerations in context aware wearable systems. 123-141 2008 12 Personal and Ubiquitous Computing 2 http://dx.doi.org/10.1007/s00779-006-0106-3 db/journals/puc/puc12.html#BharatulaLT08