Title: Geometry of CR-Submanifolds and Applications, Author: Bang-Yen Chen
Title: Lectures on Differential Geometry with Maple, Author: Mayer Humi
Title: Differential Geometry: Foundations of Cauchy-Riemann and Pseudohermitian Geometry (Book I-C), Author: Elisabetta Barletta
Title: Differential Geometry: Advanced Topics in Cauchy-Riemann and Pseudohermitian Geometry (Book I-D), Author: Elisabetta Barletta