Yes, it's an interesting topic. Someone emailed me a while ago
asking if it was possible for an amateur to receive pulsar signals
and so I did some looking into the whole subject. Here's a bunch
of papers I found and read...

Two Allan deviation graphs attached, taken from:

Relativity and Timing in X-ray Pulsar Navigation
-- N. Ashby and D.A. Howe

Then there's this old paper, by Allan himself:

Millisecond Pulsar Rivals Best Atomic Clock Stability 
-- D.W. Allan

And for extreme details on reception and corrections:

Chapter 8 High-Precision Baseband Timing of 15 Millisecond Pulsars
-- Aidan Wade Hotan

Binary and Millisecond Pulsars at the New Millennium
-- Duncan R. Lorimer

Some other interesting pulsar timing papers:

Millisecond Pulsar Observation System At CRL
-- Y. Hanado,H. Kiuchi, S. Hama, A. Kaneko, and M. Imae

Millisecond Pulsar Observation at CRL
-- Y. Hanado, M. Imae, M. Hosokawa, M. Sekido, A. Kaneko, and Y. Shibuya

An Ensemble Pulsar Time
-- G. Petit, C. Thomas, and P. Tavella

Limits to the Stability of Pulsar Time
-- G. Petit 

Application of Millisecond Pulsar Timing to the Long-Term Stability of Clock Ensembles
-- R. S. Foster and D. N. Matsakis

Pulsar-Appropriate Clock Statistics;
-- D. N. Matsakis and F. J. Josties  text

Spacecraft Navigation Using X-ray Pulsars
-- Suneel I. Sheikh, Demetrios Matsakis

Long-term Timing at Arecibo and Green Bank
-- Ingrid Stairs

Pulsar Clock
-- D.W. Allan and G.M.R. Winkler

PTTI Index of papers: