Muranov, Yu. V., and R. Jiménez. “Splitting Obstruction Groups Along One-Sided Submanifolds”. Ukrains’kyi Matematychnyi Zhurnal 66, no. 3 (March 25, 2014): 316–332. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2135.