[1] Commons VFS - Supported File Systems <http://jakarta.apache.org/commons/sandbox/vfs/filesystems.html#SFTP>
[2] draft-ietf-secsh-scp-sftp-ssh-uri-04 - Uniform Resource Identifier (URI) Scheme for Secure File Transfer Protocol (SFTP) and Secure Shell (SSH) ( 版) <http://tools.ietf.org/html/draft-ietf-secsh-scp-sftp-ssh-uri-04>
[3] draft-ietf-secsh-filexfer-13 - SSH File Transfer Protocol ( ( 版)) <http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13>
[8] pkt/apt-transport-sftp: SFTP transport for apt, built on top of apt-pkg and libssh2 ( ()) <https://github.com/pkt/apt-transport-sftp>