Chief disciples
Srimad-Bhagavatam
SB Canto 3
SB 3.2.5, Purport:
In the Bhakti-rasāmṛta-sindhu by Śrīla Rūpa Gosvāmī, the chief disciple of Lord Śrī Caitanya Mahāprabhu, these transcendental symptoms displayed by pure devotees like Uddhava are systematically described. We have written a summary study of Bhakti-rasāmṛta-sindhu entitled The Nectar of Devotion, and one may consult this book for more detailed information on the science of devotional service.