Sandeep Bhadra Shreeshankar Bodas Sanjay Shakkottai Sriram Vishwanath Communication Through Jamming over a Slotted ALOHA Channel http://arxiv.org/abs/0808.0558 2008 CoRR abs/0808.0558 db/journals/corr/corr0808.html#abs-0808-0558 informal publication