The Tangram paper has been accepted in Nature Methods, in the meantime, there is a preprint available on  biorxiv.org  https://www.biorxiv.org/content/10.1101/2020.08.29.272831v3

Deep learning and alignment of spatially-resolved whole transcriptomes of single cells in the mouse brain with Tangram

Tommaso Biancalani,  Gabriele Scalia,  Lorenzo Buffoni,  Raghav Avasthi,  Ziqing Lu,  Aman Sanger,  Neriman Tokcan,  Charles R. Vanderburg,  Asa Segerstolpe,  Meng Zhang,  Inbal Avraham-Davidi,  Sanja Vickovic,  Mor Nitzan, Sai Ma,  Jason Buenrostro,  Nik Bear Brown,  Duccio Fanelli,  Xiaowei Zhuang,  Evan Z. Macosko,  Aviv Regev

See https://www.biorxiv.org/content/10.1101/2020.08.29.272831v3