Yingfei Xiong Hui Song Zhenjiang Hu Masato Takeichi Supporting Parallel Updates with Bidirectional Model Transformations. 213-228 2009 ICMT http://dx.doi.org/10.1007/978-3-642-02408-5_15 conf/icmt/2009 db/conf/icmt/icmt2009.html#XiongSHT09