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		| Paper: | 
		Are delta Scuti pulsations regular? | 
	 
	
		| Volume: | 
		292, Interplay of Periodic, Cyclic and Stochastic Variability in Selected Areas of the H-R Diagram | 
	 
	
		| Page: | 
		193 | 
	 
	
		| Authors: | 
		Breger, M. | 
	 
	
	
		| Abstract: | 
		This paper examines the stability of delta Scuti star pulsation by considering the following questions: 1. Is the multiperiod variability regular on a short-term basis? 2. Seeming deviations from regularity: external causes 3. Seeming deviations from regularity: close frequencies This paper examines the stability of delta Scuti star pulsation by considering the following questions: 1. Is the multiperiod variability regular on a short-term basis? 2. Seeming deviations from regularity: external causes 3. Seeming deviations from regularity: close frequencies 4. Long-term changes of amplitudes and periods. | 
	 
	
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