@article{TUW-263979, author = {Fereydooni, Mehdi and Sabaei, Masoud and Dehghan, Mehdi and Taranetz, Martin and Rupp, Markus}, title = {A Mathematical Framework to Evaluate Flexible Outdoor User Association in Urban Two-Tier Cellular Networks}, journal = {IEEE Transactions on Wireless Communications}, year = {2018}, volume = {3}, number = {17}, pages = {1559--1573}, doi = {10.1109/TWC.2017.2780824}, keywords = {Urban environment; outdoor user; building blockage; random object process; biased user association.} }