A Causal Discovery Algorithm for Linear Non-Gaussian Acyclic Models, Shohei Shimizu, Patrik O. Hoyer, Antti Hyvärinen, Aapo Tankasalo, 2006Journal of Machine Learning Research, Vol. 7 - This paper presents the original LiNGAM framework, leveraging non-Gaussianity of error terms to identify full causal DAGs.
DirectLiNGAM: A direct method for learning a linear non-Gaussian acyclic model, Shohei Shimizu, Takuya Inazumi, Yasuhiro Sogawa, Akira Hyvarinen, Yoshinobu Kawahara, Takashi Washio, Patrik O. Hoyer, Kenji Bollen, 2011Journal of Machine Learning Research, Vol. 12 (Journal of Machine Learning Research)DOI: 10.5555/2012000.2012061 - Describes DirectLiNGAM, an improvement to the original LiNGAM algorithm that directly estimates the causal order and coefficients, often used in practical applications.