Somehow the adjective "safer" did not make it from your subject line
into the body of the message. But assuming you still meant "safer":
Safer C: Developing Software for High-integrity and Safety-critical
Systems Engineering)
Les Hatton
Paperback 229 pages (1 December, 1994)
Publisher: McGraw-Hill Education - Europe; ISBN: 0077076400
C Traps and Pitfalls
Andrew Koenig
Paperback 160 pages (January 1989)
Publisher: Addison Wesley; ISBN: 0201179288
Expert C Programming: Deep C Secrets
Peter Van Der Linden
Paperback 350 pages (30 April, 1994)
Publisher: Prentice Hall; ISBN: 0131774298
Also:
Guidelines for the Use of the C Language in Vehicle Based Software
The Motor Industry Software Reliability Association (MISRA)
Available only directly from
http://www.misra.co.uk.