Personal Rescue Enclosure: A tight squeeze.
NASA
David J. Shayler: Space Rescue: Ensuring the Safety of Manned Spaceflight. Springer,  2009, <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-0-387-73996-0" title="Special:BookSources/978-0-387-73996-0">ISBN 978-0-387-73996-0</a>, p. 11–13, <a href="//doi.org/10.1007/978-0-387-73996-0" class="extiw" title="doi:10.1007/978-0-387-73996-0">doi:10.1007/978-0-387-73996-0</a>